JSONLoader clean up.

src/loaders/JSONLoader.js

@@ -497,20 +497,30 @@ THREE.JSONLoader.prototype = {
 
 			// parse old style Bone/Hierarchy animations
 			var animations = [];
+
 			if ( json.animation !== undefined ) {
+
 				animations.push( json.animation );
+
 			}
+
 			if ( json.animations !== undefined ) {
+
 				if ( json.animations.length ) {
+
 					animations = animations.concat( json.animations );
+
 				} else {
+
 					animations.push( json.animations );
+
 				}
+
 			}
 
 			for ( var i = 0; i < animations.length; i ++ ) {
 
-				var clip = THREE.AnimationClip.parseAnimation( animations[i], geometry.bones );
+				var clip = THREE.AnimationClip.parseAnimation( animations[ i ], geometry.bones );
 				if ( clip ) outputAnimations.push( clip );
 
 			}