Change the RegisterClass code. Prevents an issue when creating multiple contexts.
Change the RegisterClass code.
Prevents an issue when creating multiple contexts.

nc4rrillo/glutin,retep998/glutin,mbrubeck/glutin,christopheraugustus/glutin,pcwalton/glutin,TyOverby/glutin,mneumann/glutin,vvuk/glutin,mmatyas/glutin,ozkriff/glutin,AnthIste/glutin,mbrubeck/glutin,kornholi/glutin,notriddle/glutin,tomaka/glutin,adambadawy/glutin,tomaka/winit,servo/glutin,vberger/glutin,robertknight/glutin,mitchmindtree/glutin,jdm/glutin,akiss77/glutin,ecoal95/glutin,glennw/glutin,frewsxcv/glutin,fkaa/glutin,tempbottle/glutin,aepsil0n/glutin,Jayflux/glutin,paulrouget/glutin,TimNN/glutin,mvdnes/glutin,larsbergstrom/glutin,nox/glutin,Ms2ger/glutin,bvssvni/glutin