Fixed GCC warning in release build.
Fixed GCC warning in release build.

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