Warn and early out on out of handles condition.
Warn and early out on out of handles condition.

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