incorrect default type assignment in pyxmpp.stanzaprocessor.set_message_handler()

[Jacek Konieczny]

When type == None it said to be treated as "normal" but the assignment is incorrect:
{{{
if not typ:
typ=="normal"
}}}

should be:
{{{
if not typ:
typ="normal"
}}}

[Jacek Konieczny]

(In [724]) - assignment operator fix (fixes #39)

--jajcus

[Jacek Konieczny]

Thanks :)

--jajcus