(svn r17570) -Fix: a number of Doxygen warnings about missing parameters, which were sometimes missing and sometimes just typos

src/terraform_gui.cpp

@@ -110,8 +110,9 @@ static void GenerateRockyArea(TileIndex end, TileIndex start)
 
 /**
  * A central place to handle all X_AND_Y dragged GUI functions.
- * @param e WindowEvent variable holding in its higher bits (excluding the lower
- * 4, since that defined the X_Y drag) the type of action to be performed
+ * @param proc       Procedure related to the dragging
+ * @param start_tile Begin of the dragging
+ * @param end_tile   End of the dragging
  * @return Returns true if the action was found and handled, and false otherwise. This
  * allows for additional implements that are more local. For example X_Y drag
  * of convertrail which belongs in rail_gui.cpp and not terraform_gui.cpp