[bug #63064] Statistics crashes when all pixels are nan

[Thorsten Alteholz]

Follow-up Comment #2, bug #63064 (group gnuastro):

Commit
https://codeberg.org/alteholz/gnuastro/commit/259a6d2955d8d65043b5e26be94579e90c46acfa
 converts the error complaints into info prints (which can be also avoided
with --quiet).

After printing the values up to "Standard deviation" (which now appear as
NAN), a histogram is normally added. I assume that an empty histogram is not
needed. So due to the error resulting from this empty histogram the return
code of aststatistics is still !=0. Thus the behaviour has not changed and
software that only checks this rc is still happy.

What do you think?


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