Update animstate.cpp

[brawler-567]

Checklist

• [+] Tested the change ingame
• [-] Provided screenshots if it is a visual change
• [+] Tested in combination with possibly related configuration options
• [-] Written a unit test (especially base/) or added coverage to integration test
• [+] Considered possible null pointers and out of bounds array indexing
• [+] Changed no physics that affect existing maps
• [-] Tested the change with ASan+UBSan or valgrind's memcheck (optional)
• [+] I didn't use generative AI to generate more than single-line completions