1. wxMotif toolbar works; the toggle buttons have the same width as the other

1. wxMotif toolbar works; the toggle buttons have the same width as the other
   ones and not twice as big
2. wxMotif::wxBitmap(from XPM) ctor now takes either "char **" or "const char
   **", as in wxGTK
3. added an X error handler to wxMotif (debug only)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4995 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775