From: Antonio Ospite <ao2@ao2.it>
Date: Fri, 30 Nov 2018 14:44:45 +0000 (+0100)
Subject: full_range_seasonal.gnuplot: fix calculating number of seasons
X-Git-Url: https://git.ao2.it/experiments/gnuplot_seasonal_plot.git/commitdiff_plain/bb49958d8d3c7812119af6b3328d64df158a2351?hp=bb49958d8d3c7812119af6b3328d64df158a2351

full_range_seasonal.gnuplot: fix calculating number of seasons

The samples on the x axis are used to draw boxes in the background, one
box per season.

If the samples represent less seasons than what can be filled in the
xrange, there will be holes in the background.

Fix calculating the number of samples/seasons.
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