GLX: Removed alpha from backbuffer attributes. Fix for NV issue#23.
GLX: Removed alpha from backbuffer attributes. Fix for NV issue#23.

ocornut/bgfx,BlueCrystalLabs/bgfx,ktotheoz/bgfx,cuavas/bgfx,aonorin/bgfx,janstk/bgfx,LSBOSS/bgfx,darkimage/bgfx,0-wiz-0/bgfx,septag/bgfx,marco-we/bgfx,LWJGL-CI/bgfx,elmindreda/bgfx,attilaz/bgfx,Synxis/bgfx,jdryg/bgfx,v3n/bgfx,attilaz/bgfx,jdryg/bgfx,mcanthony/bgfx,cyndis/bgfx,jpcy/bgfx,mmicko/bgfx,fluffyfreak/bgfx,MikePopoloski/bgfx,janstk/bgfx,LWJGL-CI/bgfx,darkimage/bgfx,jpcy/bgfx,cuavas/bgfx,jdryg/bgfx,LSBOSS/bgfx,marco-we/bgfx,elmindreda/bgfx,bkaradzic/bgfx,ming4883/bgfx,mendsley/bgfx,ocornut/bgfx,elmindreda/bgfx,v3n/bgfx,emoon/bgfx,bkaradzic/bgfx,jdryg/bgfx,v3n/bgfx,LWJGL-CI/bgfx,septag/bgfx,0-wiz-0/bgfx,fluffyfreak/bgfx,fluffyfreak/bgfx,Extrawurst/bgfx,sergeScherbakov/bgfx,MikePopoloski/bgfx,ktotheoz/bgfx,mendsley/bgfx,Extrawurst/bgfx,Vertexwahn/bgfx,mcanthony/bgfx,cyndis/bgfx,kondrak/bgfx,andr3wmac/bgfx,jpcy/bgfx,ming4883/bgfx,MikePopoloski/bgfx,Vertexwahn/bgfx,andr3wmac/bgfx,andr3wmac/bgfx,kondrak/bgfx,kondrak/bgfx,fluffyfreak/bgfx,ocornut/bgfx,darkimage/bgfx,bkaradzic/bgfx,Synxis/bgfx,septag/bgfx,mcanthony/bgfx,emoon/bgfx,ktotheoz/bgfx,mmicko/bgfx,LSBOSS/bgfx,Vertexwahn/bgfx,jpcy/bgfx,sergeScherbakov/bgfx,Extrawurst/bgfx,Synxis/bgfx,emoon/bgfx,0-wiz-0/bgfx,bkaradzic/bgfx,attilaz/bgfx,ming4883/bgfx,mmicko/bgfx,aonorin/bgfx,cyndis/bgfx,LWJGL-CI/bgfx,mendsley/bgfx,aonorin/bgfx,cuavas/bgfx,marco-we/bgfx,BlueCrystalLabs/bgfx,janstk/bgfx,BlueCrystalLabs/bgfx,sergeScherbakov/bgfx