This fixes an edge case in how the max acceptable edit distance is calculated
for deletions in fuzzy search, wherein the padding added to the max error count
could be negative when the query was longer than the matched term, producing a
max distance of zero.
This came up in chat a while back, where someone noted that, in the compositor,
searching for "bluir" wouldn't return the blur nodes; "blu" worked, "blui"
worked, but "bluir" returned no results, despite all three having equal edit
distances (1 insertion, 1 substitution, and 1 deletion, respectively). The edit
distance metrics themselves are calculated correctly; the issue was just with
how the distance threshold was set.
Pull Request: https://projects.blender.org/blender/blender/pulls/143741
95422b95ee