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/content.php

@@ -93,7 +93,7 @@ function content_content(&$a, $update = 0) {
 		);
 
 		$str = '';
-		if(count($r))
+		if(dbm::is_result($r))
 			foreach($r as $rr)
 				$str .= '<' . $rr['id'] . '>';
 		if(strlen($str))
@@ -113,7 +113,7 @@ function content_content(&$a, $update = 0) {
 			intval($group),
 			intval($_SESSION['uid'])
 		);
-		if(! count($r)) {
+		if(! dbm::is_result($r)) {
 			if($update)
 				killme();
 			notice( t('No such group') . EOL );
@@ -141,7 +141,7 @@ function content_content(&$a, $update = 0) {
 				AND `blocked` = 0 AND `pending` = 0 LIMIT 1",
 			intval($cid)
 		);
-		if(count($r)) {
+		if(dbm::is_result($r)) {
 			$sql_extra = " AND `item`.`parent` IN ( SELECT DISTINCT(`parent`) FROM `item` WHERE 1 $sql_options AND `contact-id` = " . intval($cid) . " and deleted = 0 ) ";
 
 		}
@@ -259,7 +259,7 @@ function content_content(&$a, $update = 0) {
 		$parents_arr = array();
 		$parents_str = '';
 
-		if(count($r)) {
+		if(dbm::is_result($r)) {
 			foreach($r as $rr)
 				if(! in_array($rr['item_id'],$parents_arr))
 					$parents_arr[] = $rr['item_id'];
@@ -782,7 +782,7 @@ function render_content(&$a, $items, $mode, $update, $preview = false) {
 							intval($item['uid']),
 							intval($item['id'])
 						);
-						if (count($r)) {
+						if (dbm::is_result($r)) {
 							$ignore = array(
 								'do' => t("ignore thread"),
 								'undo' => t("unignore thread"),