Add isEnabled to PhysicsControl interface

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10823 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/bullet-common/com/jme3/bullet/control/PhysicsControl.java

@@ -56,4 +56,10 @@ public interface PhysicsControl extends Control {
      * @param state
      */
     public void setEnabled(boolean state);
+
+    /**
+     * Returns the current enabled state of the physics control
+     * @return current enabled state
+     */
+    public boolean isEnabled();
 }