SVN commit r64114 added integer overflow checks to multiple modules.  Checks added to audioop module are incorrect and can still be bypassed:

http://svn.python.org/view/python/trunk/Modules/audioop.c?r1=64114&r2=64113

- audioop_tostereo - should be fine, but relies on undefined behaviour
- audioop_lin2lin - undetected overflow: size=1, size2=4, len=0x40000001
- audioop_ratecv - undetected overflow: nchannels=0x5fffffff (32bit)
- audioop_ulaw2lin - undetected overflow: size=4, len=0x40000001
- audioop_alaw2lin - same as audioop_ulaw2lin
- audioop_adpcm2lin - undetected overflow: size=4, len=0x20000001

Most of these are triggered by large fragment as an input.

Attached patch replaces checks added in r64114 by checks using INT_MAX.