Optimized code path for x64 builds + Monty's rounding solution.  Patch by Markus Ewald.  Closes #1361
Optimized code path for x64 builds + Monty's rounding solution.  Patch by Markus Ewald.  Closes #1361

git-svn-id: 03f0f1727258f1959b7b485b30a676bafdb78148@15267 0101bb08-14d6-0310-b084-bc0e0c8e3800

fcoulombe/vorbis,fcoulombe/vorbis,soundcloud/vorbis,fcoulombe/vorbis,soundcloud/vorbis,soundcloud/vorbis,fcoulombe/vorbis