Probably fixes this in other environments as well, or breaks it.
Move the wxWidgets_LIBRARIES paths conversion to the already existing
normalize_wx_paths() function that was using a different method that no
longer works. This converts the variable to the right format before the
tests run, fixing the Wx OpenGL test.
For the ABI checks, wrap the function pointers for the minhook
trampoline API in reinterpret_cast<LPVOID>(&fp), why this is necessary I
don't know, and it may break on other compilers. The trampoline is used
to catch message boxes opened by Wx for fatal errors.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>