Updated one more file extension checking

Theoretically the last file extension check

Author: StopMotionEGames

scripts/enforce_extension/enforce_extension.gml

@@ -1,4 +1,4 @@
 function enforce_extension(path, ext){
-	if (filename_ext(path) != ext) path += ext
+	if (string_lower(filename_ext(path)) != ext) path += ext
 	return path
 }

scripts/pattern_import/pattern_import.gml

@@ -21,7 +21,7 @@ function pattern_import() {
 
 	file_ext = string_lower(filename_ext(fn));
 	if (file_ext != ".nbp") {message(condstr(language != 1, "Error: This file is not a pattern.", "错误：该文件不是分段文件。"), condstr(language != 1, "Error", "错误")) return 0}
-	if (file_ext = ".nbp") {
+	if (file_ext == ".nbp") {
 		buffer = buffer_import(fn)
 
 		song_pat_version = buffer_read_byte()