cast to correct type, fix warning: apedec.c:859: warning: passing argument 1 of 's->dsp.bswap_buf' from incompatible pointer type
cast to correct type, fix warning: apedec.c:859: warning: passing argument 1 of 's->dsp.bswap_buf' from incompatible pointer type

git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@11679 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg