liblzma: Suppress more MSVC warnings
Merge topic 'add-liblzma' into next

8201e082 liblzma: Suppress more MSVC warnings
FindQt4: Add nativewifi and qtga plugins

While at it, update QT_QTGUI_PLUGINS to use QT_IMAGEFORMATS_PLUGINS
instead of duplicating the list.
Merge topic 'FindQt4-more-plugins' into next

4b5052b0 FindQt4: Add nativewifi and qtga plugins