Fix event logos error when teams are not selected

includes/sp-formatting-functions.php

@@ -63,6 +63,17 @@ function sp_array_overlay( $a1, $a2 ) {
     return $a1;
 }
 
+/**
+ * Array filter returns positive values only.
+ *
+ * @access public
+ * @param int $var
+ * @return bool
+ */
+function sp_filter_positive( $var = 0 ) {
+	return $var > 0;
+}
+
 /**
  * let_to_num function.
  *

templates/event-logos.php

@@ -14,7 +14,7 @@ if ( ! isset( $id ) )
 	$id = get_the_ID();
 
 $teams = get_post_meta( $id, 'sp_team' );
-$teams = array_filter( $teams );
+$teams = array_filter( $teams, 'sp_filter_positive' );
 if ( $teams ):
 	$team_logos = array();
 	foreach ( $teams as $team ):