#15 modified timerE handling

[uiltje]

On receiving provisional responses (1xx) within a non-INVITE client transaction, it is logical to reset the re-transmission timer, as the server side has indicated that it is working on it.

This is currently not happening. The timer is not reset and a retransmission is done when timer E fires regardless.

Attached patch will reset the timer on receiving a provisional response.

Hope this helps,
Tom.

[uiltje]