MDEV-32530 Race condition in lock_wait_rpl_report()

After acquiring lock_sys.latch, always load trx->lock.wait_lock.
It could have changed by another thread that did lock_rec_move()
and released lock_sys.latch right before lock_sys.wr_lock_try()
succeeded.

This regression was introduced in
commit e039720b (MDEV-32096).

Reviewed by: Vladislav Lesin

storage/innobase/lock/lock0lock.cc

@@ -1812,8 +1812,14 @@ static lock_t *lock_wait_rpl_report(trx_t *trx)
   }
   else if (!wait_lock->is_waiting())
   {
-    wait_lock= nullptr;
-    goto func_exit;
+    wait_lock= trx->lock.wait_lock;
+    if (!wait_lock)
+      goto func_exit;
+    if (!wait_lock->is_waiting())
+    {
+      wait_lock= nullptr;
+      goto func_exit;
+    }
   }
 
   if (wait_lock->is_table())