More usage of dbm::is_result($r) instead of count($r):

- count() returns very different results and never a boolean (not even false on
  error condition).
- therefore you should NOT use it in boolean expressions. This still *can* be
  done in PHP because of its lazyness. But it is discouraged if it comes to
  more clean code.

Signed-off-by: Roland Häder <roland@mxchange.org>

mod/xrd.php

@@ -21,7 +21,7 @@ function xrd_init(&$a) {
 	$r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 		dbesc($name)
 	);
-	if(! count($r))
+	if(! dbm::is_result($r))
 		killme();
 
 	$salmon_key = salmon_key($r[0]['spubkey']);