print() options not working

[Daniel J Sebald]

I've noticed that the options for print() are not working correctly.  Attached 
is a short patch with a fix.  Here are a couple lines to illustrate the problem:

function [ enhanced ] = gnuplot_set_term (plot_stream, h, term, file)
...
      if (nargin > 4 && ischar (opts_str))
        ## Options must go last
        term_str = sprintf ("%s %s", term_str, opts_str);

I believe it should be > 2, not > 4.  term_str is derived from term.

Here is some code to try as before/after:

 x = [0:0.01:1]';
 Y = [x sin(x) cos(x)];
 plot(x,Y)
 legend('x', 'sin(x)', 'cos(x)')
 print('-deps', '-solid', 'test.eps')

Dan