Fix ITS#3160, decrement conn->c_n_ops_pending when removing an op from

the conn->c_pending_ops queue.

servers/slapd/abandon.c

@@ -103,6 +103,7 @@ do_abandon( Operation *op, SlapReply *rs )
 	LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
 		if ( o->o_msgid == id ) {
 			LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops, o, slap_op, o_next );
+			op->o_conn->c_n_ops_pending--;
 			slap_op_free( o );
 			goto done;
 		}

servers/slapd/cancel.c

@@ -66,6 +66,7 @@ int cancel_extop( Operation *op, SlapReply *rs )
 	LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
 		if ( o->o_msgid == opid ) {
 			LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops, o, slap_op, o_next );
+			op->o_conn->c_n_ops_pending--;
 			slap_op_free( o );
 			found = 1;
 			break;