[ue4] Made compiling in VS work; defined behavior for GetTrackEntry() (#836)

* Added include so that compiling in VS works.

* Actually defined behavior for GetTrackEntry()

spine-ue4/Plugins/SpinePlugin/Source/SpinePlugin/Public/SpineSkeletonAnimationComponent.h

@@ -82,7 +82,7 @@ public:
 	UTrackEntry () { }		
 
 	void SetTrackEntry (spTrackEntry* entry);
-	spTrackEntry* GetTrackEntry();
+	spTrackEntry* GetTrackEntry() { return entry; }
 	
 	UFUNCTION(BlueprintCallable, Category="Components|Spine|TrackEntry")
 	int GetTrackIndex () { return entry ? entry->trackIndex : 0; }

spine-ue4/Plugins/SpinePlugin/Source/SpinePlugin/Public/SpineSkeletonComponent.h

@@ -31,6 +31,7 @@
 #pragma once
 
 #include "Components/ActorComponent.h"
+#include "SpineSkeletonDataAsset.h"
 #include "spine/spine.h"
 #include "SpineSkeletonComponent.generated.h"