conflicting changesets for __go_draw_axes__

[Ben Abbott]

I just noticed an unexpected conflict between two changesets.

The one below changed the format for tick labels for log scale to be  
"10^{%T}"

	http://hg.savannah.gnu.org/hgweb/octave/rev/f2152fad3563

This more recent one dropped the "*" from the x11 fontspec (as gnuplot  
passed this to x11 which apparently results in a search through its  
fontpath for each text object with that fontspec. Hence some  
complaints that plotting was slowed down.

	http://hg.savannah.gnu.org/hgweb/octave/rev/a00e219c402d

I see no reason why changing the gnuplot fontspec from "*,12" to ",12"  
would impact text objects with a format specification of "10^{%T}",  
but when both of these changes are present, the log scale axes label  
are always "10" with no exponent.

Using the current developers sources, this problem can be seen by ...

	clf
	semilogy (1:100)

Petr / Ethan, I've cc'd you in the hope one of you can give me some  
advice as to why this is happening and how to fix it (I see it in both  
a recent copy of gnuplot's developers sources as well as in 4.2.2).

Ben