Fix undeclared variable warning in fax_send (#7478)

* fix undeclared variable warning in fax_send

* Update fax_send.php

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Co-authored-by: FusionPBX <markjcrane@gmail.com>

app/fax_queue/resources/job/fax_send.php

@@ -63,6 +63,9 @@
 
 //shutdown call back function
 	function shutdown() {
+		//add global variables
+		global $database, $fax_queue_uuid;
+
 		//when the fax status is still sending
 		//then set the fax status to trying
 		$sql = "update v_fax_queue ";