fixing a few errors and UBs

[bitekas]

No description provided.

[Luke1410]

I understand the changes regarding the addition of the Android project is a duplicate of #82.
The fixes in RakString (missing va_end()s) is a duplicate of #36 (already incorporated in SLikeNet 0.1.0).
The fixes in PacketizedTCP (array out of bounds access) is a duplicate of #4 (already incorporated in SLikeNet 0.1.0).

Incorporating the remaining changes in the SLikeNet fork is done in pull request SLikeSoft#33 (internal case number: SLNET-186). These changes are available in the SLikeNet master repository already and are expected to go into the 0.2.0 version.

[Luke1410]

Since we did an unplanned release of SLikeNet, we decided to incorporate this pull request (aka: case SLNET-186) in SLikeNet 0.1.2 already which is available now on https://www.slikenet.com/ and on the GitHub project page: https://github.com/SLikeSoft/SLikeNet/releases/tag/v.0.1.2 .