llfs

Add const to llfs_get_filename_ext

project/Core/Src/llfs.c

@@ -141,7 +141,7 @@ size_t llfs_file_count(void) {
     return file_count;
 }
 
-char* llfs_get_filename_ext(char* filename) {
+const char* llfs_get_filename_ext(const char* filename) {
     char* dot = strrchr(filename, '.');
     if (dot == NULL || dot == filename)
         return NULL;