label offset error on 4.1

[KITA T. <t-...@cc...>]

Hello,

# I am now using heavily gnuplot epslatex terminal for my
# dissertation. Thank you very much indeed.

It seems label offset setting does not work for some offset value on gnuplot
4.1 that I built today from CVS source.
The problem happens when I set a label string and the offset at the same time.

gnuplot> set xla "x"
gnuplot> set xla -10, -2

is OK, but, I get

gnuplot> set xla "x" -10, -2
                        ^
         invalid expression 

It's OK when the offset for x-direction is positive like
gnuplot> set xla "x" 10, -2


# I looked a bit into axis.c, parse.c and util.c, but I can't locate
# where the problem is.
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  KITA Toshihiro
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