Only check for image load/store if sampling type is 2.

uniform texture2D is sampling type 1.

spirv_glsl.cpp

@@ -1005,7 +1005,7 @@ void CompilerGLSL::emit_interface_block(const SPIRVariable &var)
 void CompilerGLSL::emit_uniform(const SPIRVariable &var)
 {
 	auto &type = get<SPIRType>(var.basetype);
-	if (type.basetype == SPIRType::Image)
+	if (type.basetype == SPIRType::Image && type.image.sampled == 2)
 	{
 		if (!options.es && options.version < 420)
 			require_extension("GL_ARB_shader_image_load_store");