fix(fs): Actually count up FDs

epicardium/fs/filesystem_fat.c

@@ -285,6 +285,7 @@ efs_get_new(EpicFileSystem *fs, uint32_t *idx, struct FatObject **obj, int *rc)
 	}
 
 	*obj = &fs->pool[index];
+	*idx = index;
 	return true;
 }