adjust to ambiguous os.tmpname() behaviour on Windows and fix integration with fzf

os.tmpname() results on Windows can be different depending on compiler used to compile Lua library
i.e one of the following:
1) \sXXX. or \sXX. where X is random alphanumeric character. Old code is assuming this result.
2) <full\path\to\user\tempfolder>\sXXX.0 where X is as above. In this case old code produces incompatible with system path to temporary file (with colon in it's name) so file is created with different truncated filename and nothing is ever written to it. That way nothing is ever passed to fzf.
Code changed to be compatible with both cases.

Author: mrplumber

z.lua

@@ -1668,16 +1668,18 @@ function z_cd(patterns)
 		local flag = os.environ('_ZL_FZF_FLAG', '')
 		flag = (flag == '' or flag == nil) and '+s -e' or flag
 		cmd = ((fzf == '') and 'fzf' or fzf)  .. ' ' .. cmd .. ' ' .. flag
+		tmpname = os.tmpname()
 		if not windows then
-			tmpname = os.tmpname()
 			local height = os.environ('_ZL_FZF_HEIGHT', '35%')
 			if height ~= nil and height ~= '' and height ~= '0' then
 				cmd = cmd .. ' --height ' .. height
 			end
 			cmd = cmd .. ' < "' .. tmpname .. '"'
 		else
-			tmpname = os.tmpname():gsub('\\', ''):gsub('%.', '')
-			tmpname = os.environ('TMP', '') .. '\\zlua_' .. tmpname .. '.txt'
+			if string.match(tmpname, "^\\s%w+%.$") then
+				tmpname = tmpname:gsub('\\', ''):gsub('%.', '')
+				tmpname = os.environ('TMP', '') .. '\\zlua_' .. tmpname .. '.txt'
+			end
 			cmd = 'type "' .. tmpname .. '" | ' .. cmd
 		end
 		PRINT_MODE = tmpname
@@ -1870,10 +1872,9 @@ function cd_breadcrumbs(pwd, interactive)
 	local tmpname = '/tmp/zlua.txt'
 	local fp = io.stderr
 	if interactive == 2 then
-		if not windows then
-			tmpname = os.tmpname()
-		else
-			tmpname = os.tmpname():gsub('\\', ''):gsub('%.', '')
+		tmpname = os.tmpname()
+		if windows and string.match(tmpname, "^\\s%w+%.$") then
+			tmpname = tmpname():gsub('\\', ''):gsub('%.', '')
 			tmpname = os.environ('TMP', '') .. '\\zlua_' .. tmpname .. '.txt'
 		end
 		fp = io.open(tmpname, 'w')