LOOP: use qbarray for poll_entries.
LOOP: use qbarray for poll_entries.

This fixes an issue where removing or adding entries
can cause a realloc() to move the entries and then a
qb_list_del() causes a SIGSEGV (next pointer is now
invalid).

qbarray does not use realloc() so does not suffer from this.

Signed-off-by: Angus Salkeld <86b65304d27d8de73dd7d624c33df7e088f8d94b@redhat.com>

kgaillot/libqb,kgaillot/libqb,davidvossel/libqb,ClusterLabs/libqb,davidvossel/libqb,rubenk/libqb,gao-yan/libqb,ClusterLabs/libqb,kgaillot/libqb,ClusterLabs/libqb,gao-yan/libqb,rubenk/libqb