Fixed warning: calloc-transposed-args

[Sackzement]

[ 61%] Building C object CMakeFiles/SDL3_mixer-shared.dir/src/decoder_wav.c.o
/path/to/SDL_mixer/src/decoder_wav.c: In function ‘WAV_init_track’:
/path/to/SDL_mixer/src/decoder_wav.c:1384:58: warning: ‘SDL_calloc’ sizes specified with ‘sizeof’ in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
 1384 |         state->output.data = (Sint16 *)SDL_calloc(sizeof(Sint16), state->output.size);
      |                                                          ^~~~~~
/path/to/SDL_mixer/src/decoder_wav.c:1384:58: note: earlier argument should specify number of elements, later size of each element

Swapping the arguments gets rid of the warning.

[slouken]

Merged, thanks!