X11: Cleanup

The actual reported bug was fixed at some point during the refactoring
of the Wayland backend.  This is only a bit of tidying.  Updating the
cache before emitting events is always a nice thing to do.

Closes #2046

CONTRIBUTORS.md

@@ -168,6 +168,7 @@ video tutorials.
  - Pascal Muetschard
  - James Murphy
  - Julian Møller
+ - Julius Häger
  - Nat
  - NateIsStalling
  - ndogxj

src/x11_window.c

@@ -1488,6 +1488,9 @@ static void processEvent(XEvent *event)
             if (event->xconfigure.width != window->x11.width ||
                 event->xconfigure.height != window->x11.height)
             {
+                window->x11.width = event->xconfigure.width;
+                window->x11.height = event->xconfigure.height;
+
                 _glfwInputFramebufferSize(window,
                                           event->xconfigure.width,
                                           event->xconfigure.height);
@@ -1495,9 +1498,6 @@ static void processEvent(XEvent *event)
                 _glfwInputWindowSize(window,
                                      event->xconfigure.width,
                                      event->xconfigure.height);
-
-                window->x11.width = event->xconfigure.width;
-                window->x11.height = event->xconfigure.height;
             }
 
             int xpos = event->xconfigure.x;
@@ -1525,9 +1525,10 @@ static void processEvent(XEvent *event)
 
             if (xpos != window->x11.xpos || ypos != window->x11.ypos)
             {
-                _glfwInputWindowPos(window, xpos, ypos);
                 window->x11.xpos = xpos;
                 window->x11.ypos = ypos;
+
+                _glfwInputWindowPos(window, xpos, ypos);
             }
 
             return;