Index: branches/5.2.x/core/units/helpers/minifiers/js_minify_helper.php
===================================================================
diff -u -N -r14244 -r14628
--- branches/5.2.x/core/units/helpers/minifiers/js_minify_helper.php	(.../js_minify_helper.php)	(revision 14244)
+++ branches/5.2.x/core/units/helpers/minifiers/js_minify_helper.php	(.../js_minify_helper.php)	(revision 14628)
@@ -68,6 +68,9 @@
 
     /**
      * Perform minification, return result
+	 *
+	 * @param string $input
+	 * @return string
      */
 	public function minify($input)
     {
@@ -110,6 +113,10 @@
      * ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
      * ACTION_DELETE_A = Copy B to A. Get the next B.
      * ACTION_DELETE_A_B = Get the next B.
+	 *
+	 * @param int $command
+	 * @return void
+	 * @access protected
      */
 	protected function action($command)
     {
@@ -224,6 +231,10 @@
 
     /**
      * Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
+	 *
+	 * @param string $c
+	 * @return bool
+	 * @access protected
      */
 	protected function isAlphaNum($c)
     {
@@ -244,6 +255,8 @@
                 return $get;
             }
         }
+
+		return '';
     }
 
 	protected function multipleLineComment()
@@ -270,6 +283,8 @@
             }
             $comment .= $get;
         }
+
+		return '';
     }
 
     /**