Bug #4629 Crash after SLAVE STOP, if the IO thread is in special state.

client.c:
  Removed call to clear_slave_vio in end_server().  Removed header declaration of clear_slave_vio
slave.cc:
  Removed clear_slave_vio function and added calls to thd->clear_active_vio before each call to end_server()

sql-common/client.c

@@ -133,10 +133,6 @@ static void mysql_close_free(MYSQL *mysql);
 static int wait_for_data(my_socket fd, uint timeout);
 #endif
 
-#if defined(__WIN__) && defined(HAVE_REPLICATION) && defined(MYSQL_SERVER)
-void clear_slave_vio( MYSQL* mysql );
-#endif
-
 
 /****************************************************************************
   A modified version of connect().  my_connect() allows you to specify
@@ -823,12 +819,6 @@ void end_server(MYSQL *mysql)
     init_sigpipe_variables
     DBUG_PRINT("info",("Net: %s", vio_description(mysql->net.vio)));
     set_sigpipe(mysql);
-
-#if defined(__WIN__) && defined(HAVE_REPLICATION) && defined(MYSQL_SERVER)
-	/* if this mysql is one of our connections to the master, then clear it */
-	clear_slave_vio( mysql );
-#endif
-
     vio_delete(mysql->net.vio);
     reset_sigpipe(mysql);
     mysql->net.vio= 0;          /* Marker */

sql/slave.cc

@@ -3056,6 +3056,9 @@ dump");
       }
 	  
       thd->proc_info= "Waiting to reconnect after a failed binlog dump request";
+#ifdef SIGNAL_WITH_VIO_CLOSE
+      thd->clear_active_vio();
+#endif
       end_server(mysql);
       /*
 	First time retry immediately, assuming that we can recover
@@ -3129,6 +3132,9 @@ max_allowed_packet",
 	  goto err;
 	}
 	thd->proc_info = "Waiting to reconnect after a failed master event read";
+#ifdef SIGNAL_WITH_VIO_CLOSE
+        thd->clear_active_vio();
+#endif
 	end_server(mysql);
 	if (retry_count++)
 	{
@@ -4384,25 +4390,4 @@ template class I_List_iterator<i_string_pair>;
 #endif
 
 
-#ifdef __WIN__
-extern "C" void clear_slave_vio( MYSQL* mysql )
-{
-	if (active_mi->mysql == mysql)
-		active_mi->io_thd->clear_active_vio();
-	/* TODO: use code like below when multi-master is in place */
-	/*	LIST *cur = &master_list;
-	if (((MASTER_INFO*)cur->data)->mysql == mysql)
-	{
-		MASTER_INFO *mi = (MASTER_INFO*)cur->data;
-		mi->io_thd->clear_active_vio();
-		return;
-	}
-	else
-		cur = cur->next;*/
-}
-#endif
-
-
-
-
 #endif /* HAVE_REPLICATION */