XCB platform plugin fails with message: "undefined symbol: xcb_size_hints_set_position"

This symbol should have been replaced, by preprocessor, with "xcb_icccm_wm_hints_set_input". (See qxcbwindow.cpp, lines 59-84.)

But at runtime, the example program "qtbase/examples/widgets/mousebuttons/buttontester" fails with the "undefined symbol" message, showing it attempted to link with the un-modified symbol name. I do have the "split" xcb util libraries (including xcb/util-wm headers and binaries) at version 3.8. But our method of detection (qxcbwindow.cpp, line apparently didn't work.

The xlib platform plugin runs this program correctly on Mageia-2.