fixing bug#28641 - fixing major memory leak that only shows up under Win98

with < 64MB RAM.

affects only windows.

a=jevering
r=cathleen

xpinstall/wizard/windows/setup/xpi.c

@@ -558,6 +558,7 @@ DrawBarberBar(HWND hWnd, int nBars)
 	  }
   }
 
+	DeleteObject(hBrushClear);
 	DeleteObject(hBrush);
 	EndPaint(hWnd, &ps);
 }