fix some minor issues found by code analyzer

2 files changed, 1 insertions, 7 deletions

diff --git a/classes/db/mysqli.php b/classes/db/mysqli.php
index 817b48c0c..a05b121fc 100644
--- a/classes/db/mysqli.php
+++ b/classes/db/mysqli.php
@@ -65,7 +65,7 @@ class Db_Mysqli implements IDb {
 	}
 
 	function last_error() {
-		return mysqli_error();
+		return mysqli_error($this->link);
 	}
 
 	function last_query_error() {
diff --git a/classes/db/prefs.php b/classes/db/prefs.php
index e704a135a..64238bc78 100644
--- a/classes/db/prefs.php
+++ b/classes/db/prefs.php
@@ -118,12 +118,6 @@ class Db_Prefs {
 			$user_id = sprintf("%d", $user_id);
 		}
 
-		if ($profile) {
-			$profile_qpart = "AND profile = '$profile'";
-		} else {
-			$profile_qpart = "AND profile IS NULL";
-		}
-
 		if (!$profile || get_schema_version() < 63) $profile = null;
 
 		$type_name = "";