Added terrain editing tool.

neo/engine/tools/radiant/XYWnd.cpp

@@ -32,6 +32,7 @@ If you have questions concerning this license or the applicable additional terms
 #include "qe3.h"
 #include "Radiant.h"
 #include "XYWnd.h"
+#include "Terrain.h"
 #include "ModelViewDock.h"
 #include "ZWnd.h"
 #include "DialogInfo.h"
@@ -5838,6 +5839,8 @@ void CXYWnd::XY_Draw() {
 		brush->Brush_DrawXY(m_nViewType );
 	}
 
+	Terrain_DrawXY(m_nViewType);
+
 	DrawPathLines();
 
 	// draw pointfile