Merge "cleanup: Fix fread() and fwrite() error handling"

addons/format_mp3.c

apps/app_minivm.c

apps/app_voicemail.c

formats/format_g719.c

formats/format_g723.c

formats/format_g726.c

formats/format_g729.c

formats/format_gsm.c

formats/format_h263.c

formats/format_h264.c

formats/format_ilbc.c

formats/format_ogg_vorbis.c

formats/format_pcm.c

formats/format_siren14.c

formats/format_siren7.c

formats/format_sln.c

formats/format_vox.c

formats/format_wav.c

formats/format_wav_gsm.c