[task #16288] Warp: warn users when WCSLIB version is <7.12

[Pedram Ashofteh-Ardakani]

Follow-up Comment #6, task #16288 (project gnuastro):

Oops, I found out the condition has a logical bug. For example, version 8.10
wouldn't pass the test correctly, since ver[1] < 12 and there's an && in the
condition. To make it right, I suggest this alternative:


if( (ver[0]<7) || (ver[0]==7 && ver[1]<12) ) exit(1);


So now, if the major version number is less than 7, WCSLIB is definitely old.
But, if it the major version is 7 AND the minor is less than 12, again, it is
old. It is considered as recent otherwise.

Did I get it right Labib?


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