(svn r21667) -Codechange: Introduce _thd.Reset().

src/tilehighlight_type.h

@@ -74,6 +74,8 @@ struct TileHighlightData {
 	ViewportPlaceMethod select_method;            ///< The method which governs how tiles are selected.
 	ViewportDragDropSelectionProcess select_proc; ///< The procedure that has to be called when the selection is done.
 
+	void Reset();
+
 	bool IsDraggingDiagonal();
 	Window *GetCallbackWnd();
 };

src/viewport.cpp

@@ -2007,6 +2007,17 @@ static HighLightStyle GetAutorailHT(int x, int y)
 	return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
 }
 
+/**
+ * Reset tile highlighting.
+ */
+void TileHighlightData::Reset()
+{
+	this->pos.x = 0;
+	this->pos.y = 0;
+	this->new_pos.x = 0;
+	this->new_pos.y = 0;
+}
+
 /**
  * Is the user dragging a 'diagonal rectangle'?
  * @return User is dragging a rotated rectangle.

src/window.cpp

@@ -1366,10 +1366,7 @@ void ResetWindowSystem()
 {
 	UnInitWindowSystem();
 	InitWindowSystem();
-	_thd.pos.x = 0;
-	_thd.pos.y = 0;
-	_thd.new_pos.x = 0;
-	_thd.new_pos.y = 0;
+	_thd.Reset();
 }
 
 static void DecreaseWindowCounters()