D3D11: Fixed creating redundant depth/stencil state. Issue #623.
D3D11: Fixed creating redundant depth/stencil state. Issue #623.

Synxis/bgfx,emoon/bgfx,v3n/bgfx,v3n/bgfx,septag/bgfx,andr3wmac/bgfx,jpcy/bgfx,MikePopoloski/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,elmindreda/bgfx,aonorin/bgfx,attilaz/bgfx,marco-we/bgfx,jdryg/bgfx,LWJGL-CI/bgfx,mmicko/bgfx,emoon/bgfx,jpcy/bgfx,LWJGL-CI/bgfx,Synxis/bgfx,fluffyfreak/bgfx,jdryg/bgfx,andr3wmac/bgfx,MikePopoloski/bgfx,jdryg/bgfx,emoon/bgfx,marco-we/bgfx,mendsley/bgfx,fluffyfreak/bgfx,jpcy/bgfx,MikePopoloski/bgfx,septag/bgfx,bkaradzic/bgfx,fluffyfreak/bgfx,mendsley/bgfx,septag/bgfx,mmicko/bgfx,marco-we/bgfx,aonorin/bgfx,fluffyfreak/bgfx,aonorin/bgfx,LWJGL-CI/bgfx,kondrak/bgfx,kondrak/bgfx,attilaz/bgfx,attilaz/bgfx,andr3wmac/bgfx,elmindreda/bgfx,bkaradzic/bgfx,kondrak/bgfx,bkaradzic/bgfx,mmicko/bgfx,0-wiz-0/bgfx,elmindreda/bgfx,Synxis/bgfx,0-wiz-0/bgfx,0-wiz-0/bgfx,jpcy/bgfx,jdryg/bgfx,v3n/bgfx,mendsley/bgfx