engines/mmap: clear partial mmap flag on close

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/engines/mmap.c b/engines/mmap.c
index b938d6b..8bcd42c 100644
--- a/engines/mmap.c
+++ b/engines/mmap.c
@@ -247,6 +247,7 @@
 
 	FILE_SET_ENG_DATA(f, NULL);
 	free(fmd);
+	fio_file_clear_partial_mmap(f);
 
 	return generic_close_file(td, f);
 }