larcus94/TTTAttributedLabel — comment on commit f4ba54e00282d04cb76203251b9452727a9c375b
File: TTTAttributedLabel.m line 383
By mattt:

On second look, I guess you don't really need it if you're doing a greater-than comparison with `availableWidth`, but when it comes to potential divide-by-zero errors, paranoia is a virtue.