Fix mistakes

lua/starfall/libs_cl/file.lua

@@ -342,12 +342,17 @@ function file_library.delete(path)
 end
 
 --- Deletes a temp file
--- @param filename path The temp file name. Must be only a file and not a path
+-- @param string filename The temp file name. Must be only a file and not a path
 -- @return boolean? True if successful, nil if it wasn't found
-function file_library.deleteTemp(path)
-	checkpermission (instance, path, "file.writeTemp")
+function file_library.deleteTemp(filename)
+	checkpermission (instance, nil, "file.writeTemp")
 	checkluatype (path, TYPE_STRING)
-	path = "sf_filedatatemp/"..instance.player:SteamID64().."/" .. SF.NormalizePath(path)
+
+	if #filename > 128 then SF.Throw("Filename is too long!", 2) end
+	checkExtension(filename)
+	filename = string.lower(string.GetFileFromFilename(filename))
+
+	local path = "sf_filedatatemp/"..instance.player:SteamID64().."/"..filename
 	if file.Exists(path, "DATA") then
 		file.Delete(path)
 		return true