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/wallmessage.php

@@ -22,7 +22,7 @@ function wallmessage_post(&$a) {
 		dbesc($recipient)
 	);
 
-	if(! count($r)) {
+	if(! dbm::is_result($r)) {
 		logger('wallmessage: no recipient');
 		return;
 	}
@@ -91,7 +91,7 @@ function wallmessage_content(&$a) {
 		dbesc($recipient)
 	);
 
-	if(! count($r)) {
+	if(! dbm::is_result($r)) {
 		notice( t('No recipient.') . EOL);
 		logger('wallmessage: no recipient');
 		return;