(svn r14672) -Fix [FS#2444]: Property 7 and callback 12 were broken for aircraft.

Now callback 12 is properly called also for 'mail'.
If the callback is not used, 'mail' uses 1/4 of property 7 (rounded up).

src/openttd.cpp

@@ -2593,6 +2593,16 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (CheckSavegameVersion(103)) {
+		Vehicle *v;
+		FOR_ALL_VEHICLES(v) {
+			/* Set engine_type of shadow and rotor */
+			if (v->type == VEH_AIRCRAFT && !IsNormalAircraft(v)) {
+				v->engine_type = v->First()->engine_type;
+			}
+		}
+	}
+
 	GamelogPrintDebug(1);
 
 	return InitializeWindowsAndCaches();