check if link exists first and delete

recipes-core/apps-web/files/camogm.php

@@ -72,6 +72,7 @@ if ($cmd=="create_symlink"){
 		$path = $_GET['path'];
 		if (is_dir($path)){
 			//exec("ln -sf $path /www/pages/video;sync");
+			if (file_exists("/tmp/video")) unlink("/tmp/video");
                         exec("ln -sf $path /tmp/video");
 		}
 	}