Error if the ImageData given to love.window.setIcon is not a 32 bit RGBA format.

--HG--
branch : minor

src/modules/window/wrap_Window.cpp

@@ -365,7 +365,9 @@ int w_getPosition(lua_State *L)
 int w_setIcon(lua_State *L)
 {
 	image::ImageData *i = luax_checktype<image::ImageData>(L, 1);
-	luax_pushboolean(L, instance()->setIcon(i));
+	bool success = false;
+	luax_catchexcept(L, [&]() { success = instance()->setIcon(i); });
+	luax_pushboolean(L, success);
 	return 1;
 }