Rework GC's sizeclass such as bins in a group go from 0 to 3 instead of 1 to 4.
Rework GC's sizeclass such as bins in a group go from 0 to 3 instead of 1 to 4.

UplinkCoder/SDC,deadalnix/SDC,SDC-Developers/SDC,SDC-Developers/SDC,schancel/SDC,schancel/SDC,deadalnix/SDC,bpr/SDC,UplinkCoder/SDC,SDC-Developers/SDC,UplinkCoder/SDC,deadalnix/SDC,bpr/SDC,bpr/SDC,schancel/SDC