Switch to full screen and back (ALT-F) now works also under windows.

doc/ChangeLog.html

@@ -756,6 +756,11 @@
     <LI>Renamed FrameCounter to GameCycle.
     <LI>Network timeout didn't block mouse movement and scrolling.
     <LI>Removed WaitAndKeepSync from GameLoop.
+    <LI>Switch to full screen and back (ALT-F) now works also under windows.
+    <LI>Fixed some video locking problems.
+    <LI>Fixed bug #537142: Crashes with flame shield attacking buildings.
+    <LI>New video frame and game simulation timing code written. Closes bug
+	#205006.
     <LI>+++
     </UL>
 </UL>

src/video/sdl.cpp

@@ -858,7 +858,7 @@ global void ToggleGrabMouse(void)
 */
 global void ToggleFullScreen(void)
 {
-#ifndef USE_WIN32
+#ifdef USE_WIN32
     long framesize;
     void *pixels;
     SDL_Color *palette;
@@ -927,6 +927,8 @@ global void ToggleFullScreen(void)
 
     SDL_SetClipRect(Screen, &clip);
 
+    Invalidate();			// Update display
+
     return;
 #else
     SDL_WM_ToggleFullScreen(Screen);