- Added function isEmptyString to fhc_helper

- Added function isEmptyArray to fhc_helper
- Adapted the code in application/* to use as much as possible this two new functions
- Removed the php function empty almost everywhere

application/libraries/NavigationLib.php

@@ -300,12 +300,10 @@ class NavigationLib
 	 */
 	private function _getNavigationtPage($params)
 	{
-		//
-		$trimed = trim($params[self::NAVIGATION_PAGE_PARAM]);
 		if ($params != null
 			&& is_array($params)
 			&& isset($params[self::NAVIGATION_PAGE_PARAM])
-			&& !empty($trimed))
+			&& !isEmptyString($params[self::NAVIGATION_PAGE_PARAM]))
 		{
 			$navigationPage = $params[self::NAVIGATION_PAGE_PARAM];
 		}