GL: Properly reset FBO after emulated blit (#2782)
GL: Properly reset FBO after emulated blit (#2782)

Reset the previously bound FBO after rendering an emulated blit instead
of binding the default framebuffer.

Co-authored-by: Sami Kyöstilä <cc489b4bd23a83d64b37c83151ae093e7ae275a5@unrealvoodoo.org>
LWJGL-CI/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,bkaradzic/bgfx,bkaradzic/bgfx