sw: assert SfxPoolItem::operator==

Change-Id: I9b48fc25abcbdeceefd5a86d8305209f312c9976
sc: assert SfxPoolItem::operator==

Change-Id: I69b7d2b9e580b08ebd59866f1244e0e61c4b1dcb
sw: deploy some asserts in SwpHints::TryInsertNesting()

Change-Id: I584edadf13b34edf054e3405865c43bae74a7830