(svn r11759) -Feature: Add drag-n-drop support to the raise/lower land tools. Land is raised/lowered at the start and the rest of the area levelled to match. Patch by Roujin.

src/main_gui.cpp

@@ -1382,6 +1382,8 @@ static void ScenEditLandGenWndProc(Window *w, WindowEvent *e)
 				case DDSP_CREATE_ROCKS:
 				case DDSP_CREATE_DESERT:
 				case DDSP_CREATE_WATER:
+				case DDSP_RAISE_AND_LEVEL_AREA:
+				case DDSP_LOWER_AND_LEVEL_AREA:
 				case DDSP_LEVEL_AREA:
 				case DDSP_DEMOLISH_AREA:
 					GUIPlaceProcDragXY(e);