fix: some warning from compiler

Author: sysnote8main

src/main/java/be4rjp/sclat/api/SclatUtil.kt

@@ -124,7 +124,7 @@ object SclatUtil {
         commands.add(
             (
                 "map " + Sclat.conf?.servers!!.getString("ServerName") + " " +
-                    DataMgr.getMapRandom(if (MatchMgr.mapcount == 0) 0 else MatchMgr.mapcount - 1)?.mapName!!
+                    DataMgr.getMapRandom(if (MatchMgr.mapcount == 0) 0 else MatchMgr.mapcount - 1).mapName!!
                 ),
         )
         commands.add("stop")

src/main/java/be4rjp/sclat/server/EquipmentServer.kt

@@ -77,7 +77,7 @@ internal class EquipEchoThread(
                     EquipmentServerManager.addEquipmentCommand(cmd)
 
                     val args: Array<String?> = cmd!!.split(" ".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
-                    when (args!![0]) {
+                    when (args[0]) {
                         "setting" -> {
                             // setting [settingData] [uuid]
                             if (args.size == 3) {

src/main/java/be4rjp/sclat/server/EquipmentServerManager.kt

@@ -18,7 +18,7 @@ object EquipmentServerManager {
         for (cmd in commands) {
             val args: Array<String?> = cmd.split(" ".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
 
-            when (args!![0]) {
+            when (args[0]) {
                 "set" -> {
                     // add [statusName] [number or name] [uuid]
                     if (args.size == 4) {

src/main/java/be4rjp/sclat/server/StatusServer.kt

@@ -86,7 +86,7 @@ internal class EchoThread(
 
                     val args: Array<String?> = cmd!!.split(" ".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
 
-                    if (args!![0] == "return" && args.size == 2) {
+                    if (args[0] == "return" && args.size == 2) {
                         if (args[1]!!.length == 36) {
                             PlayerReturnManager.addPlayerReturn(args[1])
                         }

src/main/java/be4rjp/sclat/tutorial/Tutorial.kt

@@ -211,7 +211,7 @@ object Tutorial {
                         if (player.world !== w) continue
                         if (player.location.distance(loc) < 8) {
                             player.inventory.clear()
-                            getPlayerData(player)!!.isInMatch = false
+                            getPlayerData(player)!!.setIsInMatch(false)
                             getPlayerData(player)!!.isJoined = false
                         }
                     }

src/main/java/be4rjp/sclat/weapon/Blaster.kt

@@ -103,7 +103,7 @@ object Blaster {
                     Gear.getGearInfluence(player, Gear.Type.MAIN_INK_EFFICIENCY_UP)
                 ).toFloat()
         val ball = player.launchProjectile<Snowball>(Snowball::class.java)
-        (ball as CraftSnowball).handle.item = CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!))
+        (ball as CraftSnowball).handle.setItem(CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!)))
         player.world.playSound(player.location, Sound.ENTITY_PIG_STEP, 0.3f, 1f)
         val vec =
             player

src/main/java/be4rjp/sclat/weapon/Brush.kt

@@ -341,7 +341,7 @@ object Brush {
                     Gear.getGearInfluence(player, Gear.Type.MAIN_INK_EFFICIENCY_UP)
                 ).toFloat()
         val ball = player.launchProjectile<Snowball>(Snowball::class.java)
-        (ball as CraftSnowball).handle.item = CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!))
+        (ball as CraftSnowball).handle.setItem(CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!)))
         var vec: Vector? =
             player
                 .location

src/main/java/be4rjp/sclat/weapon/Bucket.kt

@@ -119,7 +119,7 @@ object Bucket {
                     Gear.getGearInfluence(player, Gear.Type.MAIN_INK_EFFICIENCY_UP)
                 ).toFloat()
         val ball = player.launchProjectile<Snowball>(Snowball::class.java)
-        (ball as CraftSnowball).handle.item = CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!))
+        (ball as CraftSnowball).handle.setItem(CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!)))
         var vec: Vector? =
             player
                 .location

src/main/java/be4rjp/sclat/weapon/Burst.kt

@@ -130,7 +130,7 @@ object Burst {
         PaintMgr.PaintHightestBlock(player.location, player, true, true)
 
         val ball = player.launchProjectile<Snowball>(Snowball::class.java)
-        (ball as CraftSnowball).handle.item = CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!))
+        (ball as CraftSnowball).handle.setItem(CraftItemStack.asNMSCopy(ItemStack(getPlayerData(player)!!.team.teamColor!!.wool!!)))
         player.world.playSound(player.location, Sound.ENTITY_PIG_STEP, 0.3f, 1f)
         val vec =
             player