(svn r12948) -Fix [FS#1982]: all vehicles would be available when an original scenario would be played.

src/openttd.cpp

@@ -884,6 +884,9 @@ void SwitchMode(int new_mode)
 				SetDParamStr(0, GetSaveLoadErrorString());
 				ShowErrorMessage(INVALID_STRING_ID, STR_012D, 0, 0);
 			} else {
+				if (_saveload_mode == SLD_LOAD_SCENARIO) {
+					StartupEngines();
+				}
 				/* Update the local player for a loaded game. It is either always
 				* player #1 (eg 0) or in the case of a dedicated server a spectator */
 				SetLocalPlayer(_network_dedicated ? PLAYER_SPECTATOR : PLAYER_FIRST);