audioOutput_osx.c, aac_decode.c, mp4_decode.c have NOT been thoroughly
checked, but I nevertheless managed to eyeball and fix one
incompatibility in audioOutput_osx.c

All other files have been build successfully with gcc 2.95


git-svn-id: https://svn.musicpd.org/mpd/trunk@3688 09075e82-0dd4-0310-85a5-a0d7c8717e4f