Fixes inconsistency in reload times for Cnc Aircraft

Fixes reload time inconsistency caused by always running the reload
counter even when not needing to reload.  Also adds the ability to
specify that the reload counter restarts when firing a shot.

OpenRA.Mods.RA/Reloads.cs

@@ -20,6 +20,8 @@ namespace OpenRA.Mods.RA
 		public readonly int Count = 0;
 		[Desc("How long it takes to do so.")]
 		public readonly int Period = 50;
+		[Desc("Whether or not reload counter should be reset when ammo has been fired.")]
+		public readonly bool ResetOnFire = false;
 
 		public object Create(ActorInitializer init) { return new Reloads(init.self, this); }
 	}
@@ -29,21 +31,33 @@ namespace OpenRA.Mods.RA
 		[Sync] int remainingTicks;
 		ReloadsInfo Info;
 		LimitedAmmo la;
+		int previousAmmo;
 
 		public Reloads(Actor self, ReloadsInfo info)
 		{
 			Info = info;
 			remainingTicks = info.Period;
 			la = self.Trait<LimitedAmmo>();
+			previousAmmo = la.GetAmmoCount();
 		}
 
 		public void Tick(Actor self)
 		{
-			if (--remainingTicks == 0)
+			if (!la.FullAmmo() && --remainingTicks == 0)
 			{
 				remainingTicks = Info.Period;
+
 				for (var i = 0; i < Info.Count; i++)
 					la.GiveAmmo();
+
+				previousAmmo = la.GetAmmoCount();
+			}
+
+			// Resets the tick counter if ammo was fired.
+			if (Info.ResetOnFire && la.GetAmmoCount() < previousAmmo)
+			{
+				remainingTicks = Info.Period;
+				previousAmmo = la.GetAmmoCount();
 			}
 		}
 	}