Bug 514076 Fennec produces a error report with enable-faststart and Screen rotation. r=dougt.

widget/src/windows/nsWindow.cpp

@@ -5632,7 +5632,9 @@ PRBool nsWindow::OnHotKey(WPARAM wParam, LPARAM lParam)
 
 void nsWindow::OnSettingsChange(WPARAM wParam, LPARAM lParam)
 {
-  nsWindowGfx::OnSettingsChangeGfx(wParam);
+  if (mWindowType == eWindowType_dialog ||
+      mWindowType == eWindowType_toplevel )
+    nsWindowGfx::OnSettingsChangeGfx(wParam);
 }
 
 // Scrolling helper function for handling plugins.  

widget/src/windows/nsWindowGfx.cpp

@@ -240,7 +240,8 @@ void nsWindowGfx::OnSettingsChangeGfx(WPARAM wParam)
         oldSize.height * oldSize.width)
       nsWindow::sSharedSurfaceData = nsnull;
 
-    glpDD->RestoreAllSurfaces();
+    if(glpDD)
+      glpDD->RestoreAllSurfaces();
   }
 #endif
 }