[sr-dev] new compiler warning

[Juha Heinanen]

Today when building K 5.0 on Debian Jessie, I got this compiler warning
that I don't remember seeing before:

CC (gcc) [M domain.so]		domain.o
domain.c: In function 'w_lookup_domain':
domain.c:222:5: warning: 'prefix' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(prefix)
     ^

-- Juha