It appears that the C++ standard allows overriding destructors to be marked
"override," but at least some MSVC versions complain about it, so at least make
sure such destructors are explicitly marked "virtual."
Change-Id: I0e1cafa7584fd16ebdce61f569eae2373a71b0a1
...mostly done with a rewriting Clang plugin, with just some manual tweaking
necessary to fix poor macro usage.
Change-Id: I71fa20213e86be10de332ece0aa273239df7b61a
...which reveals that some uses are not derived from XEventListener, so re-
introduce BaseMutexHelper as an alternative (which originally got superseded by
DisambiguationHelper in 09b546cf9c1d0d9f78066e70a0348c7678cdcb14 "Fix
overloaded-virtual warning in canvas").
Change-Id: I1418370733b72526ec481b70fa69f03e7c28b7ce
...which reveals that SpriteCanvasBase is not derived from XBitmapCanvas, so
split up BitmapCanvasBase (just XBitmap) and BitmapCanvasBase2 (plus
XBitmapCanvas) and make IntegerBitmapBase directly abstract over those two as
arguments.
Change-Id: Ieae87fe466bb9f1a861c8a95162ef25235ae5799
see https://gerrit.libreoffice.org/#/c/3367/
and Change-Id: I00c96fa77d04b33a6f8c8cd3490dfcd9bdc9e84a for details
Change-Id: I199a75bc4042af20817265d5ef85b1134a96ff5a
