Fix pass by reference error in get_allowed_devices

get_allowed_devices has a pass by reference on the "total_rows" field.  It is used in several places to pass the total_rows back to a counter.  Here though, we are passing a number directly to the function, which errors out with "Uncaught Error: get_allowed_devices(): Argument #4 ($total_rows) cannot be passed by reference".  So we will just place a dummy variable in front to catch the pass.

This wasn't caught before because the previous parentheses issue.

lib/auth.php

@@ -929,6 +929,7 @@ function is_tree_branch_empty($tree_id, $parent = 0) {
 	);
 
 	if (!cacti_sizeof($sites)) {
+		$total_rows = -1;	/* Adding to fix pass by reference error in get_allowed_devices */
 		if (cacti_sizeof($hosts) && cacti_sizeof(get_allowed_devices('h.id IN(' . implode(',', $hosts) . ')', 'description', '', -1)) > 0) {
 			return false;
 		}
@@ -944,7 +945,7 @@ function is_tree_branch_empty($tree_id, $parent = 0) {
 				), 'id', 'id'
 			);
 		}
-
+		$total_rows = -1;	/* Adding to fix pass by reference error in get_allowed_devices */
 		if (cacti_sizeof($site_hosts) && cacti_sizeof(get_allowed_devices('h.id IN(' . implode(',', $site_hosts) . ')', 'description', '', -1)) > 0) {
 			return false;
 		}