Fixing a bug that caused NPE to be thrown when no actions where applied to armature.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@8360 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ArmatureModifier.java

@@ -118,6 +118,7 @@ import com.jme3.util.BufferUtils;
 				//read animations
 				ArrayList<Animation> animations = new ArrayList<Animation>();
 				List<FileBlockHeader> actionHeaders = blenderContext.getFileBlocks(Integer.valueOf(FileBlockHeader.BLOCK_AC00));
+				if(actionHeaders != null) {//it may happen that the model has armature with no actions
 					for (FileBlockHeader header : actionHeaders) {
 						Structure actionStructure = header.getStructure(blenderContext);
 						String actionName = actionStructure.getName();
@@ -136,6 +137,7 @@ import com.jme3.util.BufferUtils;
 						boneAnimation.setTracks(tracks);
 						animations.add(boneAnimation);
 					}
+				}
 				animData = new AnimData(new Skeleton(bones), animations);
 			}
 		}