Hide webcam in menu if not set...

Setting webcam to blank or Null hides the webcam option in the menu

menu.php

@@ -32,7 +32,9 @@
 <li>
 <?php if($weatherflowoption=="yes"){ echo "<a href=https://staging.smartweather.weatherflow.com/map/".$lat."/".$lon."/".$weatherflowmapzoom." data-lity title='see your weather station on official weatherflow map'><weather34menumarkerblue></weather34menumarkerblue> Weatherflow Map </a></li>" ;}
 else echo "";?>
+<?php if(!empty($webcamurl) && $webcamurl != ' ' && $webcamurl != 'Null' && $webcamurl != 'null'){?>
 <li><!---webcam---> <a href="cam.php" data-lity title="WEATHERSTATION WEBCAM"> <weather34menumarkeryellow></weather34menumarkeryellow> Web Cam </a></li>  
+<?php };?>
 <li><!--contact info---> <a href="bio.php" data-lity title="Weather Station Owner Contact Card Info"> <weather34menumarkerorange></weather34menumarkerorange> Contact Card</a></li> 
 <li><!--hardware info---> <a href="stationinfo.php" data-lity title="Hardware Weather Station Hardware Info"> <weather34menumarkerred></weather34menumarkerred> Hardware Info</a></li>