(cherry picked from commit 8f3c796e)

coverity#1343624 Unchecked dynamic_cast

(cherry picked from commit 26fddc31)

coverity#1343625 Unchecked dynamic_cast

(cherry picked from commit 9e83e310)

coverity#1343626 Unchecked dynamic_cast

(cherry picked from commit c2f17316)

coverity#1343627 Unchecked dynamic_cast

(cherry picked from commit 1276f6da)

coverity#1343629 Unchecked dynamic_cast

(cherry picked from commit 274d265e)

1343630 Dereference after null check

(cherry picked from commit 960cfb7e)
(cherry picked from commit 7e6e8aa8)

Change-Id: Ibcf05263f7bea50f70d55f4d8944d0a41d54851d
a303a5dc97fb5e491e86a3484040e657f1b480d4
b534e4e8ecf50a9159c5e98e2c899bf13f44c654
52e6d6c9cb48880185293fb9825d7a6530ee767d
83c0febcbbf0f19a05818e0575921d1d6254935f
93b7298d785e57a4ef854cea3e9cd5c2c0f35849
81223b868f069755e8a46c57bfe0282021f26de7
Reviewed-on: https://gerrit.libreoffice.org/20832Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

(cherry picked from commit b8b7669d)