Fix WithSpriteBody repeated custom anim playback

PlayCustomAnimationRepeating looping back into itself via Action instead of simply using Animation.PlayRepeating is weird, and in fact results in 1 frame/tick not being played correctly.
This means that on bleed (before this fix) an animation looped via
PlayCustomAnimationRepeating will go out of sync with an anim using
Animation.PlayRepeating, even if both have identical length and Tick
rate.

OpenRA.Mods.Common/Traits/Render/WithSpriteBody.cs

@@ -104,7 +104,7 @@ public void PlayCustomAnimation(Actor self, string name, Action after = null)
 		public void PlayCustomAnimationRepeating(Actor self, string name)
 		{
 			var sequence = NormalizeSequence(self, name);
-			DefaultAnimation.PlayThen(sequence, () => PlayCustomAnimationRepeating(self, sequence));
+			DefaultAnimation.PlayRepeating(NormalizeSequence(self, sequence));
 		}
 
 		public void PlayCustomAnimationBackwards(Actor self, string name, Action after = null)