Fixed compile for GLES (missing GL_RG).
Fixed compile for GLES (missing GL_RG).
grimfang4/sdl-gpu,ademuri/sdl-gpu,masonwheeler/sdl-gpu,masonwheeler/sdl-gpu,Helios-vmg/sdl-gpu,ademuri/sdl-gpu,grimfang4/sdl-gpu,Helios-vmg/sdl-gpu,ademuri/sdl-gpu,masonwheeler/sdl-gpu,ademuri/sdl-gpu,masonwheeler/sdl-gpu,grimfang4/sdl-gpu,Helios-vmg/sdl-gpu,grimfang4/sdl-gpu,Helios-vmg/sdl-gpu