wininet: Handle NULL req->netconn in INTERNET_DIAGNOSTIC_SOCKET_INFO query.

dlls/wininet/http.c

@@ -1997,7 +1997,7 @@ static DWORD HTTPREQ_QueryOption(object_header_t *hdr, DWORD option, void *buffe
             info->Flags |= IDSI_FLAG_KEEP_ALIVE;
         if (req->proxy)
             info->Flags |= IDSI_FLAG_PROXY;
-        if (req->netconn->secure)
+        if (req->netconn && req->netconn->secure)
             info->Flags |= IDSI_FLAG_SECURE;
 
         return ERROR_SUCCESS;

dlls/wininet/tests/http.c

@@ -3249,6 +3249,7 @@ static void test_HttpQueryInfo(int port)
 
 static void test_options(int port)
 {
+    INTERNET_DIAGNOSTIC_SOCKET_INFO idsi;
     HINTERNET ses, con, req;
     DWORD size, error;
     DWORD_PTR ctx;
@@ -3349,6 +3350,10 @@ static void test_options(int port)
     ok(ret, "InternetQueryOption failed %u\n", GetLastError());
     ok(ctx == 3, "expected 3 got %lu\n", ctx);
 
+    size = sizeof(idsi);
+    ret = InternetQueryOption(req, INTERNET_OPTION_DIAGNOSTIC_SOCKET_INFO, &idsi, &size);
+    ok(ret, "InternetQueryOption failed %u\n", GetLastError());
+
     /* INTERNET_OPTION_PROXY */
     SetLastError(0xdeadbeef);
     ret = InternetQueryOptionA(ses, INTERNET_OPTION_PROXY, NULL, NULL);