[sr-dev] add_contact_alias(0) is proto differs

[Juha Heinanen]

When adding transport proto check to add_contact_alias, I noticed that
in receive_info struct proto is defined like this:

	char proto;

and in sip_uri struct like this:

	unsigned short proto; /*!< from transport */

That does not look good to me.  They should have the same type in both.

-- Juha