Summarized Changelog:

• Use unsigned integers correctly.
• Initialize pointers that might otherwise not be.
• Fix some inconsistencies in the frontend output.
• mp4read_open: add check for failed frame buffer allocation.
• stszin: add check for allocation error and integer overflow.
• Unbreak PS audio.

• Converted an .aac file to wav using faad.
• Tested that mp4 aac playback in vlc worked as expected.