log of negative X handling

[Dmitri A. S. <das...@gm...>]

I notice that while gnuplot can gracefully handle log scale for negative
Y axis, it segfault on negative X values. E.g.:

gnuplot> set log y
gnuplot> plot sin(x)

(looks OK)

gnuplot> set log x
gnuplot> plot sin(x)
         x range must be greater than 0 for log scaleSegmentation fault



This is with today's (2007-12-17) CVS snapshot of 4.3 on linux (Fedora 8).

Sincerely,

Dmitri.
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