Fix compiler error on mysqld.cc

sql/mysqld.cc

@@ -2003,7 +2003,7 @@ The server will not act as a slave.");
 
 #ifdef __NT__
   if (hPipe == INVALID_HANDLE_VALUE &&
-      (!have_tcpip || opt_disable_networking)
+      (!have_tcpip || opt_disable_networking))
   {
     sql_print_error("TCP/IP or --enable-named-pipe should be configured on NT OS");
 	unireg_abort(1);