Fix if mail is missing

jm2l/views.py

@@ -952,7 +952,7 @@ def participer(request):
         # Prepare Message
         message = Message(subject="[JM2L] Mon inscription au site web JM2L",
                           sender="contact@jm2l.linux-azur.org",
-                          recipients=[NewUser.mail],
+                          recipients=[NewUser.mail or TmpUsr.mail],
                           body=mail_plain, html=mail_html)
         
         message.add_bcc("spam@style-python.fr")