Set fairly randomly picked size when generating dot graphs based on
example I came across, to avoid the following error from pdflatex when
building documentation:
[46 <./rdata_map_luts.pdf>]
! Dimension too large.
I am not sure which size make sense, nor how to decide which value are
best.
This issue is a fix for a build problem reported in
<URL: https://bugs.debian.org/1133986 >, which include a
link to the build log of the failed build.
c03c0d5f9d