Port r17543 from Tremor.
Port r17543 from Tremor.

A codebook that allows values outside the circular range of the piecewise
 floor1 representation can overflow the lookup
Also fix a typo in the comments of the original patch.


git-svn-id: 03f0f1727258f1959b7b485b30a676bafdb78148@17555 0101bb08-14d6-0310-b084-bc0e0c8e3800

jdm/vorbis,brion/vorbis,jdm/vorbis,pcwalton/vorbis,libninjam/libvorbis,Distrotech/libvorbis,brion/vorbis,ShiftMediaProject/vorbis,Distrotech/libvorbis,libninjam/libvorbis,libninjam/libvorbis,KTXSoftware/vorbis,wighawag/vorbis,KTXSoftware/vorbis,TitaniumEagle/libvorbis,OffByOneStudios/vorbis,wighawag/vorbis,ShiftMediaProject/vorbis,Rillke/vorbis,OffByOneStudios/vorbis,pcwalton/vorbis,brion/vorbis,ShiftMediaProject/vorbis,wighawag/vorbis,Rillke/vorbis,pcwalton/vorbis,OffByOneStudios/vorbis,OffByOneStudios/vorbis,TitaniumEagle/libvorbis,TitaniumEagle/libvorbis,jdm/vorbis,brion/vorbis,libninjam/libvorbis,jdm/vorbis,Rillke/vorbis,TitaniumEagle/libvorbis,ShiftMediaProject/vorbis,wighawag/vorbis,Rillke/vorbis,pcwalton/vorbis,KTXSoftware/vorbis,ShiftMediaProject/vorbis,Distrotech/libvorbis,jdm/vorbis,ShiftMediaProject/vorbis,Distrotech/libvorbis,KTXSoftware/vorbis,pcwalton/vorbis