Delete dashPattern, compoundArray, customStartCap and customEndCap
arrays if they were created in the destructor.

Change-Id: I5f3821b1ab0ac31a9cd4bc402c04090585953573
Reviewed-on: https://gerrit.libreoffice.org/4821Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>