multipath-tools: Intialize pointer passed to get_cmdvec
multipath-tools: Intialize pointer passed to get_cmdvec

get_cmdvec can return before the vector argument has been initialized. Fix this
by initializing the pointer before passing it to get_cmdvec. This fixes a
segfault in the interactive mode when hitting the tab key directly on the
command prompt.

Signed-off-by: Christof Schmitt <afe27fc9cc8724d5819dd86aabfb0a732dbdb77b@de.ibm.com>

unakatsuo/multipath-tools,unakatsuo/multipath-tools,vijaychauhan/multipath-tools,unakatsuo/multipath-tools,grzn/multipath-tools-explained,vijaychauhan/multipath-tools,grzn/multipath-tools-explained