Added extra parenthesis to remove compiler warning

Fixed test case rpl_incident.test (synchronize drop table, masked IO thread behaviour)

mysql-test/r/rpl_incident.result

@@ -31,7 +31,7 @@ Master_Host	127.0.0.1
 Master_User	root
 Master_Port	MASTER_PORT
 Connect_Retry	1
-Master_Log_File	master-bin.000002
+Master_Log_File	#
 Read_Master_Log_Pos	#
 Relay_Log_File	#
 Relay_Log_Pos	#
@@ -74,7 +74,7 @@ Master_Host	127.0.0.1
 Master_User	root
 Master_Port	MASTER_PORT
 Connect_Retry	1
-Master_Log_File	master-bin.000002
+Master_Log_File	#
 Read_Master_Log_Pos	#
 Relay_Log_File	#
 Relay_Log_Pos	#
@@ -104,4 +104,3 @@ Master_SSL_Key
 Seconds_Behind_Master	#
 Master_SSL_Verify_Server_Cert	No
 DROP TABLE t1;
-DROP TABLE t1;

mysql-test/t/rpl_incident.test

@@ -22,7 +22,7 @@ connection slave;
 SELECT * FROM t1;
 
 --replace_result $MASTER_MYPORT MASTER_PORT
---replace_column 1 # 7 # 8 # 9 # 22 # 23 # 33 #
+--replace_column 1 # 6 # 7 # 8 # 9 # 22 # 23 # 33 #
 --query_vertical SHOW SLAVE STATUS
 
 SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
@@ -34,10 +34,9 @@ START SLAVE;
 
 SELECT * FROM t1;
 --replace_result $MASTER_MYPORT MASTER_PORT
---replace_column 1 # 7 # 8 # 9 # 22 # 23 # 33 #
+--replace_column 1 # 6 # 7 # 8 # 9 # 22 # 23 # 33 #
 --query_vertical SHOW SLAVE STATUS
 
-DROP TABLE t1;
 connection master;
 DROP TABLE t1;
-
+--sync_slave_with_master

sql/log_event.cc

@@ -6809,7 +6809,7 @@ int Write_rows_log_event::do_after_row_operations(TABLE *table, int error)
     fires bug#27077
     todo: explain or fix
   */
-  if (local_error= table->file->ha_end_bulk_insert())
+  if ((local_error= table->file->ha_end_bulk_insert()))
   {
     table->file->print_error(local_error, MYF(0));
   }