gnuplot 4.2 for DOS and DJGPP

[Petr M. <mi...@ph...>]

I wanted to recompile gnuplot 4.2 for DOS (recycling an old experimental 
PC). I have updated Makefile for DJGPP (committed to cvs for 4.3, but works 
with 4.2 as well).

However, drawing on SVGA is a bit strange:
- "test" command passes perfectly
- "splot x" draws OK on every 2nd attempt, the surface not being
  drawn otherwise
- "splot x, 10+x, 20+x" draws only the first surface
- "plot x" does not draw anything on the 1st "plot", then draws
  only the border

All works fine when compiled gnuplot 4.0. Since there are no differences 
between djsvga.trm from 4.0 and 4.2, I wonder why this can happen?
Could someone try it?

Note: you can try it even under Linux, by xdosemu or qemu.

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PM