Realloc fix v1.1

Update PR with less useless else statements.

Ticket: https://redmine.openinfosecfoundation.org/issues/1062

PR builds:
- PR build: https://buildbot.suricata-ids.org/builders/regit/builds/76
- PR pcaps: https://buildbot.suricata-ids.org/builders/regit-pcap/builds/14