[libgdx] Improved fix for timeScale not returning to the setup pose.

We should complete a mix frozen by timeScale 0 only when `to` has been mixed out. However, it would probably be better for TrackEntry#timeScale to not affect the mix time at all.
#1194

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java

@@ -172,6 +172,12 @@ public class AnimationState {
 
 		// Require mixTime > 0 to ensure the mixing from entry was applied at least once.
 		if (to.mixTime > 0 && to.mixTime >= to.mixDuration) {
+			if (from.timeScale == 0) {
+				// from has 0 timeScale and has been mixed out, remove its mix and apply it one more time to return to the setup pose.
+				from.timeScale = 1;
+				from.mixTime = 0;
+				from.mixDuration = 0;
+			}
 			// Require totalAlpha == 0 to ensure mixing is complete, unless mixDuration == 0 (the transition is a single frame).
 			if (from.totalAlpha == 0 || to.mixDuration == 0) {
 				to.mixingFrom = from.mixingFrom;
@@ -182,13 +188,6 @@ public class AnimationState {
 			return finished;
 		}
 
-		// If to has 0 timeScale and is not the first entry, remove the mix and apply it one more time to return to the setup pose.
-		if (to.timeScale == 0 && to.mixingTo != null) {
-			to.timeScale = 1;
-			to.mixTime = 0;
-			to.mixDuration = 0;
-		}
-
 		from.trackTime += delta * from.timeScale;
 		to.mixTime += delta * to.timeScale;
 		return false;