IconState::get_image does not properly work with multi-dir states #24
Description
See test case here: https://github.com/warriorstar-orion/testcase_dmi_rust and run with cargo run --package testcase_dmi_rust --bin testcase_dmi_rust
The DMI file in the repro repo contains the following single 4-dir icon state with multiple frames:
When attempting to extract all frames of the SOUTH icon state, we instead get the first frames of all directions:
