A new plotting problem

[Michael D. Godfrey]

Since the updates of 30 Sept, plotting dies at line 329 of
__go_draw_axes__.m.  The error message is:
error: structure has no member `facecolor'
error: evaluating argument list element number 1
error: called from:
error:   /usr/local/share/octave/3.1.51+/m/plot/__go_draw_axes__.m at 
line 332, column 20
error:   /usr/local/share/octave/3.1.51+/m/plot/__go_draw_figure__.m at 
line 63, column 8
error:   /usr/local/share/octave/3.1.51+/m/plot/gnuplot_drawnow.m at 
line 68, column 5
octave:2>

The failing lines are:
      doing_interp_color = strncmp (obj.facecolor, "interp", 6);
     if (doing_interp_color)

The patch of replacing these lines by:
if(0)

works as a test, but not a real fix.

Also note that the error messages references line 332, but the failing 
line is 329.

Michael