[asterisk-ss7] No siganlling link available sending message

[Ruddy Gbaguidi]

Hi Matthew
Ok, I have added some extra logs in the libss7 source code and tried to
debug it.
First of all, the version of libss7 is 
libss7 version: SVN-mattf-bug13495-r249M 
and the version of asterisk is
Asterisk SVN-mattf-bug13495-r167584M built by root on a x86_64 running Linux
on 2009-01-20 18:44:42 UTC

I don't know if anything drastic changed since.