winport - fix bug using all available window size when maximizing and fullscreening

desmume/src/frontend/windows/CWindow.cpp

@@ -29,6 +29,9 @@
 #include "IORegView.h"
 #include "windriver.h"
 
+
+extern bool fsWindow;
+
 //-----------------------------------------------------------------------------
 //   The Toolkit - Helpers
 //-----------------------------------------------------------------------------
@@ -660,6 +663,7 @@ void WINCLASS::sizingMsg(WPARAM wParam, LPARAM lParam, LONG keepRatio)
 	int frameHeight = frameInfo.bottom-frameInfo.top + tbheight;
 
 	if((keepRatio & FULLSCREEN))
+		if(fsWindow)
 			frameWidth = frameHeight = 0;
 
 	// Calculate the minimum size in pixels