Windows/tst_QTcpServer: Suppress crash notification of crashingServer.

Suppress message dialog of the test helper as does QTestlib.

Task-number: QTBUG-52714
Change-Id: I5efd7d72f77c7689500ecaccf46f1f9dfb312140
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@theqtcompany.com>

tests/auto/network/socket/qtcpserver/crashingServer/main.cpp

@@ -34,9 +34,16 @@
 
 #include <QtCore>
 #include <QtNetwork>
+#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE) && !defined(Q_OS_WINRT) && defined(Q_CC_MSVC)
+#  include <crtdbg.h>
+#endif
 
 int main(int argc, char *argv[])
 {
+     // Windows: Suppress crash notification dialog.
+#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE) && !defined(Q_OS_WINRT) && defined(Q_CC_MSVC)
+    _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG);
+#endif
     QCoreApplication app(argc, argv);
 
     QTcpServer server;