Fixing error in search library

lib/BooleanSearch.php

@@ -233,7 +233,9 @@ function assemble_query ($criteria, $searchfields) {
 	} //foreach $whereCriterias
 
 	$whereClause .= str_repeat(')', $nesting);
+	$whereClause = trim ($whereClause);
 
+	if ($whereClause != '') {
 		$query = sprintf ("SELECT bookmark.title,
 					bookmark.url,
 					bookmark.description,
@@ -254,6 +256,10 @@ function assemble_query ($criteria, $searchfields) {
 					$mysql->escape ($username),
 					$whereClause);
 	
+	}
+	else {
+		$query = false;
+	}
 	return $query;
 
 }