fix crash on illegal text input

(ok it's probably the wrong way)
2013-12-30 00:46:09 -05:00 · 2013-12-30 00:46:09 -05:00 · 9f8e99ea95
parent 651fea2a00
commit 9f8e99ea95
1 changed files with 1 additions and 0 deletions
--- a/signs_lib.lua
+++ b/signs_lib.lua
@ -211,6 +211,7 @@ local fences_with_sign = { }
 local function split_lines_and_words(text)
 	local lines = { }
 	local line = { }
+	if not text then return end
 	for word in text:gmatch("%S+") do
 		if word == "|" then
 			table.insert(lines, line)