fix implication that op is updated when -1 is returned.
fix implication that op is updated when -1 is returned.



git-svn-id: a21e2c1a9f1a66aa2b49a2fb7314df0f83771e9b@15906 0101bb08-14d6-0310-b084-bc0e0c8e3800

TitaniumEagle/libogg,TechSmith/libogg,gcp/libogg,Rillke/libogg,oss-forks/libogg,oss-forks/libogg,libninjam/libogg,ShiftMediaProject/ogg,ahmedammar/platform_external_gst_ogg,libninjam/libogg,Distrotech/libogg,spritebuilder/ogg,ShiftMediaProject/ogg,pcwalton/ogg,wighawag/ogg,ahmedammar/platform_external_gst_ogg,Distrotech/libogg,oss-forks/libogg,spritebuilder/ogg,OffByOneStudios/ogg,pcwalton/ogg,pcwalton/ogg,TitaniumEagle/libogg,TechSmith/libogg,gcp/libogg,OffByOneStudios/ogg,KTXSoftware/ogg,KTXSoftware/ogg,Rillke/libogg,wighawag/ogg