hold not functioning properly in 3.0.3

[John W. Eaton]

On  9-Dec-2008, Jonathan Stickel wrote:

| I just discovered that "hold on" is not working properly in Octave 
| 3.0.3.  To reproduce, do
| 
| octave:1> figure(1)
| octave:2> hold on
| octave:3> plot(1:10,1:10)
| octave:4> plot(1:10,(1:10).^2)
| 
| Only the second line plot is shown.  Inserting the hold command in 
| between the plotting commands does work, but the above should work also.
| 
| 
| My platform is Mac OS X, with gnuplot and x11 terminal for plotting.

I can confirm this problem with 3.0.3 installed from a Debian
package but it works correctly for me with the current sources from
the Mercurial archive.

We should probably try to fix this problem for 3.0.4.

jwe