fix 'off by one' error for emtpy scripts.

scripts/embed.lua

@@ -49,6 +49,7 @@
 		local max = 4096
 		local start = 1
 		local len = contents:len()
+		if len > 0 then
 			while start <= len do
 				local n = len - start
 				if n > max then n = max end
@@ -64,6 +65,9 @@
 
 				start = finish + 1
 			end
+		else
+			table.insert(result, "\t\"\",")
+		end
 
 		table.insert(result, "")
 	end