xcb uses 32bits for xcb_keysym_t, but Xlib uses 64bit longs on 64bits
systems for KeySym and all other XIDs on the client side. Passing
an xcb_keysym_t* to XLookupString, expecting a KeySym*, would overwrite
the next 32bits in memory and possibly cause a crash.
This patch makes sure that a KeySym* is passed to XLookupString, and use
the signature declared in Xutil.h to make sure the types are right.
Encapsulate it in qxlibconvenience.cpp since including Xutil.h inside
qxcbkeyboard.cpp causes macro expansion problems.
Change-Id: I68451a24cb44a43dfa4382b5dce1ea7845f14e26
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Laszlo Papp <lpapp@kde.org>
341dcae472