Moved WM_DELETE_WINDOW retrieval to init.

src/x11_init.c

@@ -484,6 +484,11 @@ static GLboolean initDisplay(void)
     _glfw.x11.screen = DefaultScreen(_glfw.x11.display);
     _glfw.x11.root = RootWindow(_glfw.x11.display, _glfw.x11.screen);
 
+    // Find or create the protocol atom for window close notifications
+    _glfw.x11.wmDeleteWindow = XInternAtom(_glfw.x11.display,
+                                           "WM_DELETE_WINDOW",
+                                           False);
+
     // Check for XF86VidMode extension
     _glfw.x11.vidmode.available =
         XF86VidModeQueryExtension(_glfw.x11.display,

src/x11_window.c

@@ -164,11 +164,6 @@ static GLboolean createWindow(_GLFWwindow* window,
         window->x11.overrideRedirect = GL_TRUE;
     }
 
-    // Find or create the protocol atom for window close notifications
-    _glfw.x11.wmDeleteWindow = XInternAtom(_glfw.x11.display,
-                                           "WM_DELETE_WINDOW",
-                                           False);
-
     // Declare the WM protocols supported by GLFW
     {
         int count = 0;