MDEV-21535 Unnecessarily large ha_innobase::records_in_range() scans

The bug was already fixed in
commit 1242eb3d
but the test innodb.innodb_wl6326 had not been enabled.

mysql-test/suite/innodb/disabled.def

@@ -11,4 +11,3 @@
 ##############################################################################
 
 create-index-debug : MDEV-13680 InnoDB may crash when btr_page_alloc() fails
-innodb_wl6326 : MDEV-21535 Too broad ha_innobase::records_in_range()

mysql-test/suite/innodb/r/innodb_wl6326.result

@@ -295,8 +295,6 @@ SET DEBUG_SYNC = 'now WAIT_FOR lockwait1 TIMEOUT 1';
 SET DEBUG_SYNC = 'now WAIT_FOR lockwait2 TIMEOUT 1';
 SET DEBUG_SYNC = 'now SIGNAL continue';
 connection con1;
-Warnings:
-Warning	1639	debug sync point wait timed out
 connection con2;
 a00	a01
 ar	a