shader: Make sure to use textureSize with the correct arguments
In the case of gsampler2DRect, there is no second argument to be provided to textureSize.
Makes the spec@arb_texture_rectangle@copyteximage rect samples=2
not crash.
In the case of gsampler2DRect, there is no second argument to be provided to textureSize.
Makes the spec@arb_texture_rectangle@copyteximage rect samples=2
not crash.