Fix a crash in reporting without gpu set.
Ignore POSIX warnings in zlib.
Prevent some warnings in vfpu, add reporting.

Uninitialized value and out of bounds error.
Fix a couple bad bounds checks in VAG/Mpeg.
Prevent some threading related NULL derefs.
Clean up some variable shadowing.
Clean up some atrac-related type/shadow warnings.
Prevent a type comparison warning.
Add a bounds check for interrupts.
Merge pull request #1835 from unknownbrackets/warnings

Warning fixes