Log Message:
Update x11/fltk to 1.1.5rc1 and s/USE_X11BASE/USE_X11/.

Changes:

CHANGES IN FLTK 1.1.5rc1

        - Documentation updates (STR #186, STR #245, STR #250,
          STR #277, STR #281, STR #328, STR #338)
        - fl_scroll() did not handle scrolling from off-screen on
          WIN32 (STR #315)
        - Fl_File_Chooser did not allow manual entry of a drive
          letter (STR #339)
        - Fl_Menu now uses the boxtype to redraw the menu
          background (STR #204)
        - Fl_Scroll now shows the background image when a framed
          box type is used and the Fl_Scroll is a direct
          decendent of a window (STR #205)
        - Added a new_directory_tooltip string pointer to allow
          localization of the file chooser's new directory
          button (STR #340)
        - Added Fl_Menu_::find_item() method (STR #316)
        - The Fl_Widget copy operator definitions were not
          conditionally compiled properly (STR #329)
        - FLUID's Layout functionality did not move child
          widgets when laying out group widgets (STR #319)
        - FLUID's Layout->Center In Group functionality did not
          properly handle widgets that were children of a
          Fl_Window widget (STR #318)
        - The Fl_Text_Display destructor did not remove the
          predelete callback associated with the current buffer
          (STR #332)
        - Fixed several bugs in the MacOS X Fl::add_fd()
          handling (STR #333, STR #337)
        - The Fl_Text_Display widget did not display selections
          set by the application (STR #322)
        - FLUID crashed if you did layout with a window widget
          (STR #317)
        - Fl_Scroll::clear() didn't remove the child widget from
          the Fl_Scroll widget (STR #327)
        - Fl_Value_Slider::draw_bg() didn't always apply the
          clipping rectangle (STR #235)
        - fl_filename_relative() returned the wrong string if
          the absolute pathname was equal to the current working
          directory (STR #224)
        - Fl_Help_Dialog didn't correctly restore the scroll
          position when going forward/back in the link history
          if the file changed (STR #218)

And more...