Fixed hidden window positioning on Metacity.

README.md

@@ -57,6 +57,7 @@ guide in the GLFW documentation.
                    listed for Thunderbolt monitor
  - [X11] Added setting of the `WM_CLASS` property to the initial window title
  - [X11] Bugfix: Removed joystick axis value negation left over from GLFW 2
+ - [X11] Bugfix: The position of hidden windows was ignored by Metacity
 
 
 ## Contact

src/x11_window.c

@@ -256,6 +256,11 @@ static GLboolean createWindow(_GLFWwindow* window,
             hints->flags |= PPosition;
             _glfwPlatformGetMonitorPos(wndconfig->monitor, &hints->x, &hints->y);
         }
+        else
+        {
+            hints->flags |= PPosition;
+            hints->x = hints->y = 0;
+        }
 
         if (!wndconfig->resizable)
         {