[unity] Fixed potential null reference exception upon access in Start if `Reload Scene` is disabled. Closes #1919.

spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonAnimation.cs

@@ -52,7 +52,12 @@ namespace Spine.Unity {
 		/// <summary>
 		/// This is the Spine.AnimationState object of this SkeletonAnimation. You can control animations through it.
 		/// Note that this object, like .skeleton, is not guaranteed to exist in Awake. Do all accesses and caching to it in Start</summary>
-		public Spine.AnimationState AnimationState { get { return this.state; } }
+		public Spine.AnimationState AnimationState {
+			get {
+				Initialize(false);
+				return this.state;
+			}
+		}
 		private bool wasUpdatedAfterInit = true;
 		#endregion
 
@@ -105,6 +110,7 @@ namespace Spine.Unity {
 				}
 			}
 			set {
+				Initialize(false);
 				if (_animationName == value) {
 					TrackEntry entry = state.GetCurrent(0);
 					if (entry != null && entry.loop == loop)

spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonGraphic.cs

@@ -377,7 +377,12 @@ namespace Spine.Unity {
 		public event SkeletonRendererDelegate OnMeshAndMaterialsUpdated;
 
 		protected Spine.AnimationState state;
-		public Spine.AnimationState AnimationState { get { return state; } }
+		public Spine.AnimationState AnimationState {
+			get {
+				Initialize(false);
+				return state;
+			}
+		}
 
 		[SerializeField] protected Spine.Unity.MeshGenerator meshGenerator = new MeshGenerator();
 		public Spine.Unity.MeshGenerator MeshGenerator { get { return this.meshGenerator; } }