branches/zip: btr_cur_optimistic_insert(): If btr_page_reorganize()

fails, reset the insert buffer free bits for the page.

btr/btr0cur.c

@@ -1170,6 +1170,8 @@ btr_cur_optimistic_insert(
 		if (UNIV_UNLIKELY(!btr_page_reorganize(block, index, mtr))) {
 			ut_a(buf_block_get_page_zip(block));
 
+			ibuf_reset_free_bits_with_type(index->type, block);
+
 			goto fail;
 		}