Link Winsock after uasync and include socket headers first

tools/chatgui/src/main.cpp

@@ -1,3 +1,6 @@
+#ifdef _WIN32
+#include <winsock2.h>
+#endif
 #include <QCoreApplication>
 #include <QApplication>
 #include <QIcon>
@@ -39,9 +42,10 @@ static DWORD count_threads(void) {
 
 static BOOL WINAPI console_ctrl_handler(DWORD dwCtrlType) {
     if (dwCtrlType == CTRL_C_EVENT || dwCtrlType == CTRL_BREAK_EVENT) {
-        if (g_mainWindow)
-            QMetaObject::invokeMethod(g_mainWindow, [g_mainWindow] {
-                g_mainWindow->requestShutdown();
+        MainWindow* window = g_mainWindow;
+        if (window)
+            QMetaObject::invokeMethod(window, [window] {
+                window->requestShutdown();
             }, Qt::QueuedConnection);
         else if (g_ctrl_node)
             g_ctrl_node->requestStop();