Close Cursor objects explicitly

Milter/greysql.py

@@ -26,14 +26,17 @@ class Greylist(object):
     "Delete records past the retention limit."
     now = time.time() + timeinc - self.greylist_retain
     cur = self.conn.cursor()
+    try:
       cur.execute('delete from greylist where lastseen < ?',(now,))
       cnt = cur.rowcount
       self.conn.commit()
+    finally: cur.close()
     return cnt
 
   def check(self,ip,sender,recipient,timeinc=0):
     "Return number of allowed messages for greylist triple."
     cur = self.conn.cursor()
+    try:
       cur.execute('''select firstseen,lastseen,cnt,umis from greylist where
         ip=? and sender=? and recipient=?''',(ip,sender,recipient))
       r = cur.fetchone()
@@ -70,6 +73,7 @@ class Greylist(object):
           where ip=? and sender=? and recipient=?''',
           (now,now,0,None,ip,sender,recipient))
       self.conn.commit()
+    finally: cur.close()
     return cnt
 
   def close(self):