Remove reference to drawnow 'mono' throughout scripts and code, update args test * Backend.cc (Backend::print_figure): Remove Boolean 'mono' from argument list. * Backend.h (Backend::print_figure): Ditto. * graphics.cc (drawnow): Remove 'mono' from argument list. Change args length test from 4 to 3. Remove computation of unused stack variable 'mono' and variable type check on MONO. Change DEBUG_FILE argument test from 3 to 2. Remove 'mono' from argument list of toolkit print_figure() call. * graphics.in.h (graphics_toolkit::print_figure): Remove 'mono' from list of input arguments for both definition and call to represented toolkit. * __init_fltk__.cc (fltk_graphics_toolkit::print_figure): Remove unused 'mono' variable from list of input arguments. * __init_gnuplot__.cc (gnuplot_graphics_toolkit::print_figure): Remove 'mono' variable from list of input arguments. Remove args(4) and set args(3) to debug_file. * __gnuplot_drawnow__.m (__gnuplot_drawnow__): Change max number of input arguments from 5 to 4. Change test for debug_file option from 5 to 4. * __gnuplot_print__.m (local_drawnow): Remove construction of 'mono' variable. Remove 'mono' from drawnow() calls.

--- a/libgui/graphics/Backend.h	Sat May 14 10:50:33 2016 +1000
+++ b/libgui/graphics/Backend.h	Fri May 13 18:59:29 2016 -0500
@@ -56,7 +56,7 @@
 
   void print_figure (const graphics_object& go,
                      const std::string& term,
-                     const std::string& file_cmd, bool /*mono*/,
+                     const std::string& file_cmd,
                      const std::string& /*debug_file*/) const;
 
   static Object* toolkitObject (const graphics_object& go);