Please describe the problem:
Sometimes (when you move or resize window) condition in GIOFunc == 0. After that my connection freezes, and I never get any additional callback.

Steps to reproduce:
1. This is a simple program you can reproduce with:

#include <windows.h>
#include <winsock2.h>
#include <gtk/gtk.h>

int sock;
GIOChannel *chan;
gchar server[100] = "64.161.255.20";
int port = 6667;
GtkTextBuffer *buffer;

gboolean giofunc_func(GIOChannel *source, GIOCondition condition, gpointer data)
{
  GtkTextIter iter;
  char buf[1025];

  switch(condition) {
  case G_IO_IN:
    recv(sock, buf, 1024, 0);
    buf[1024] = 0;
    gtk_text_buffer_get_end_iter(buffer, &iter);
    gtk_text_buffer_insert(buffer, &iter, buf, -1);
    break;
  case G_IO_OUT:
    Sleep(5000);
    gtk_text_buffer_get_end_iter(buffer, &iter);
    gtk_text_buffer_insert(buffer, &iter, "Connecting!\n", -1);
    send(sock, "NICK gtk_bug_testing\r\n", 22, 0);
    send(sock, "USER u 0 * :u\r\n", 15, 0);
    send(sock, "JOIN #gtk+\r\n", 12, 0);
    send(sock, "LIST\r\n", 6, 0);
    return FALSE;
  default:
    gtk_text_buffer_get_end_iter(buffer, &iter);
    gtk_text_buffer_insert(buffer, &iter, "\nBug!\n", -1);
    break;
  }
  return TRUE;
}

void network_init()
{
  struct sockaddr_in addr;
  int on = 1;

  sock = socket(AF_INET, SOCK_STREAM, 0);
  ioctlsocket(sock, FIONBIO, &on);
  chan = g_io_channel_win32_new_socket(sock);
  addr.sin_family = AF_INET;
  addr.sin_port = htons(port);
  addr.sin_addr.s_addr = inet_addr(server);

  g_io_add_watch(chan, G_IO_IN, giofunc_func, NULL);
  g_io_add_watch(chan, G_IO_OUT, giofunc_func, NULL);
  connect(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr_in));
}

int main(int argc, char *argv[])
{
  GtkWidget *window, *textview, *scroll;

  WSADATA wsaData;
  WSAStartup(MAKEWORD( 2, 2 ), &wsaData);

  gtk_init(&argc, &argv);
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_default_size(window, 500, 500);
  textview = gtk_text_view_new();
  buffer = gtk_text_view_get_buffer(textview);

  scroll = gtk_scrolled_window_new(NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
  gtk_container_add(GTK_CONTAINER(scroll), textview);

  gtk_container_add(GTK_CONTAINER(window), scroll);

  gtk_widget_show_all(window);
  network_init();
  gtk_main();
}

2. You should run the program
3. It will connect to freenode's irc server and begin listing all possible channels
4. Move or resize window during it

Actual results:
It will insert in textview "Bug!" (condition == 0) and connection will "freeze" - you can check it by printing something to #gtk+ channel from another irc client.

Expected results:


Does this happen every time?
Sometimes, with intensive traffic receiving/sending

Other information: