Change: Allow building canal by area outside editor (#10173)

src/dock_gui.cpp

@@ -192,7 +192,7 @@ struct BuildDocksToolbarWindow : Window {
 	{
 		switch (this->last_clicked_widget) {
 			case WID_DT_CANAL: // Build canal button
-				VpStartPlaceSizing(tile, (_game_mode == GM_EDITOR) ? VPM_X_AND_Y : VPM_X_OR_Y, DDSP_CREATE_WATER);
+				VpStartPlaceSizing(tile, VPM_X_AND_Y, DDSP_CREATE_WATER);
 				break;
 
 			case WID_DT_LOCK: // Build lock button

src/water_cmd.cpp

@@ -443,12 +443,6 @@ CommandCost CmdBuildCanal(DoCommandFlag flags, TileIndex tile, TileIndex start_t
 	/* Outside of the editor you can only build canals, not oceans */
 	if (wc != WATER_CLASS_CANAL && _game_mode != GM_EDITOR) return CMD_ERROR;
 
-	/* Outside the editor you can only drag canals, and not areas */
-	if (_game_mode != GM_EDITOR) {
-		TileArea ta(tile, start_tile);
-		if (ta.w != 1 && ta.h != 1) return CMD_ERROR;
-	}
-
 	CommandCost cost(EXPENSES_CONSTRUCTION);
 
 	std::unique_ptr<TileIterator> iter;