Bug with rectangular footprints near (l,b) = (180, 90)

[ghost]

There is a problem with rectangular footprints near the galactic poles as they cross l = 180. In certain cases, galfast finds extremely large numbers of stars in the footprint, and attempts to output the results. This doesn't appear to be a serious bug, but is something to be aware of when operating near the poles.

For example:

L0=179 L1=180 B0=89 B1=90 galfast catalog cmd.conf --output=text.txt

This will find of order 10^9 stars in a 1 deg^2 footprint. It appears like this only occurs when L1=180 and B1=90, because neither of the following have a problem.

L0=179 L1=180 B0=88 B1=89 galfast catalog cmd.conf --output=test.txt
L0=180 L1=181 B0=89 B1=90 galfast catalog cmd.conf --output=test.txt

Both of these will only output ~100 stars.