(svn r5853) -Fix: [elrails] FS#178 Electric Trains can leave Conventional Depot

now the user will get an error if he tries to start the train and the status bar will say "no power" instead of "stopped"
	Electric trains already driving in and out of non-electrified depots will still do so, but you can't start new ones

lang/english.txt

@@ -2529,6 +2529,8 @@ STR_886F_TRANSFER                                               :{BLACK}Transfer
 STR_TRAIN_STOPPING                                              :{RED}Stopping
 STR_TRAIN_STOPPING_VEL                                          :{RED}Stopping, {VELOCITY}
 STR_INCOMPATIBLE_RAIL_TYPES                                     :Incompatible rail types
+STR_TRAIN_NO_POWER                                              :{RED}No power
+STR_TRAIN_START_NO_CATENARY                                     :This track lacks catenary, so the train can't start
 
 ##id 0x9000
 STR_9000_ROAD_VEHICLE_IN_THE_WAY                                :{WHITE}Road vehicle in the way

train_cmd.c

@@ -1243,6 +1243,8 @@ int32 CmdStartStopTrain(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 		return_cmd_error(error);
 	}
 
+	if (v->vehstatus & VS_STOPPED && v->u.rail.cached_power == 0) return_cmd_error(STR_TRAIN_START_NO_CATENARY);
+
 	if (flags & DC_EXEC) {
 		if (v->vehstatus & VS_STOPPED && v->u.rail.track == 0x80) {
 			DeleteVehicleNews(p1, STR_8814_TRAIN_IS_WAITING_IN_DEPOT);

train_gui.c

@@ -954,7 +954,11 @@ static void TrainViewWndProc(Window *w, WindowEvent *e)
 			str = STR_885C_BROKEN_DOWN;
 		} else if (v->vehstatus & VS_STOPPED) {
 			if (v->u.rail.last_speed == 0) {
-				str = STR_8861_STOPPED;
+				if (v->u.rail.cached_power == 0) {
+					str = STR_TRAIN_NO_POWER;
+				} else {
+					str = STR_8861_STOPPED;
+				}
 			} else {
 				SetDParam(0, v->u.rail.last_speed);
 				str = STR_TRAIN_STOPPING + _patches.vehicle_speed;