X11: Cleanup

This is technically valid but misleading and may inspire future bugs
like the one fixed by 0b652a44d2.

(cherry picked from commit 73a8ebb691)

src/x11_window.c

@@ -682,7 +682,7 @@ static GLFWbool createNativeWindow(_GLFWwindow* window,
         {
             XChangeProperty(_glfw.x11.display, window->x11.handle,
                             _glfw.x11.NET_WM_STATE, XA_ATOM, 32,
-                            PropModeReplace, (unsigned char*) &states, count);
+                            PropModeReplace, (unsigned char*) states, count);
         }
     }