rs_sprite_side: ERROR: 0:11: '%' does not operate on 'int' and 'int'

Log:
```
[Shader] Loading rs_sprite_side shader
[Audio::FMODDriver] LOOP: 2088645 -> 4828924
Failed to compile fragment shader:
ERROR: 0:11: '%' does not operate on 'int' and 'int'
```

OS: MacOS
CPU: Apple M1