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/modexp.php

@@ -12,7 +12,7 @@ function modexp_init(&$a) {
 			dbesc($nick)
 	);
 
-	if(! count($r))
+	if(! dbm::is_result($r))
 		killme();
 
 	$lines = explode("\n",$r[0]['spubkey']);