Bug#950669: cups-browsed: segfault at 0 ip 00000000f79ffb5b sp 00000000fffd3828 error 4 in libc-2.29.so

[Till Kamppeter]

In a very recent commit I have added crash guards to the 
is_local_hostname() function, which cover also the case of host_name 
being NULL:

https://github.com/OpenPrinting/cups-filters/commit/4157690bf
I hope this helps here.

But anyway, thanks for the deep analysis of the problem.

   Till