Fix segfault while running with -a option and deinstalling broken packages with incorrect plists.
Fix segfault while running with -a option and deinstalling broken
packages with incorrect plists.

PR:		bin/115327
Submitted by:	Michael Zhilin <mizhka@gmail.com>
MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase