getter for native_library_loaded

src/main/java/com/lambdaworks/crypto/SCrypt.java

@@ -28,6 +28,14 @@ public class SCrypt {
         native_library_loaded = loader.load("scrypt", true);
     }
 
+    /**
+     * Tells if the native lib has been successfully loaded.
+     * @return <code>true</code> while working on native lib.
+     */
+    public static boolean isNativeImpl(){
+        return native_library_loaded;
+    }
+
     /**
      * Implementation of the <a href="http://www.tarsnap.com/scrypt/scrypt.pdf"/>scrypt KDF</a>.
      * Calls the native implementation {@link #scryptN} when the native library was successfully