tree 658387fb13e0b1ed7a0882a528bd76bc08634d51
parent e391e0cba766af6e2bcfe59d8dea0542f43c6936
author Avery Pennarun <apenwarr@gmail.com> 1364642225 -0400
committer Avery Pennarun <apenwarr@gmail.com> 1364843627 -0400

Fix the comparator when dealing with nulls.

Turns out neither 'x' < 0 nor 'x' > 0.  However, 'x' > '0', and '0' < 5, and
!('0' > 5). So basically, if it's undefined, order it like '0' instead of 0.