[sr-dev] 4.2 build is b0rken

According to the https://travis-ci.org/sippy/voiptests:

LD (gcc) [M ratelimit.so] ratelimit.so CC (gcc) [M registrar.so] api.o CC (gcc) [M registrar.so] common.o CC (gcc) [M registrar.so] config.o CC (gcc) [M registrar.so] lookup.o CC (gcc) [M registrar.so] path.o CC (gcc) [M registrar.so] reg_mod.o CC (gcc) [M registrar.so] regpv.o CC (gcc) [M registrar.so] regtime.o CC (gcc) [M registrar.so] reply.o CC (gcc) [M registrar.so] rerrno.o CC (gcc) [M registrar.so] save.o save.c: In function ‘pack_ci’: save.c:325:5: error: ‘ucontact_info_t’ has no member named ‘server_id’

Please fix. Thanks!