fix initializing a variable

src/common/helpers.py

@@ -1360,13 +1360,13 @@ def get_subscription_request_msg(account=None):
 
 def replace_dataform_media(form, stanza):
     import xmpp
+    found = False
     for field in form.getTags('field'):
         for media in field.getTags('media'):
             for uri in media.getTags('uri'):
                 uri_data = uri.getData()
                 if uri_data.startswith('cid:'):
                     uri_data = uri_data[4:]
-                    found = False
                     for data in stanza.getTags('data', namespace=xmpp.NS_BOB):
                         if data.getAttr('cid') == uri_data:
                             uri.setData(data.getData())