Botch edit in files setup

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/filesetup.c b/filesetup.c
index 461f130..9862c7d 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -720,9 +720,9 @@
 		dprint(FD_FILE, "resize file array to %d files\n", new_size);
 
 		td->files = realloc(td->files, new_size * sizeof(f));
-		td->files[cur_files] = f;
 		td->files_size = new_size;
 	}
+	td->files[cur_files] = f;
 
 	/*
 	 * init function, io engine may not be loaded yet