Added error when bgfx::init is called without bgfx::setPlatformData.
Added error when bgfx::init is called without bgfx::setPlatformData.

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