Fix msvc C4067 warns (#911)

* fix msvc C4067 warns

* fix msvc C4067 warns

* fix msvc C4067 warns

Author: yuehanlin

Source/HTTP/Curl/CurlMulti.cpp

@@ -257,7 +257,17 @@ HRESULT CurlMulti::Perform() noexcept
     {
         // Reschedule Perform if there are still running requests
         int workAvailable{ 0 };
-#if HC_PLATFORM == HC_PLATFORM_GDK || CURL_AT_LEAST_VERSION(7,66,0)
+#if HC_PLATFORM == HC_PLATFORM_GDK
+        // Try curl_multi_poll first, fall back to curl_multi_wait if not available
+        if (CURL_CALL(curl_multi_poll))
+        {
+            result = CURL_CALL(curl_multi_poll)(m_curlMultiHandle, nullptr, 0, POLL_TIMEOUT_MS, &workAvailable);
+        }
+        else
+        {
+            result = CURL_CALL(curl_multi_wait)(m_curlMultiHandle, nullptr, 0, POLL_TIMEOUT_MS, &workAvailable);
+        }
+#elif defined(CURL_AT_LEAST_VERSION) && CURL_AT_LEAST_VERSION(7,69,0)
         // Try curl_multi_poll first, fall back to curl_multi_wait if not available
         // For non-GDK, CURL_CALL expands directly to the symbol
         if (CURL_CALL(curl_multi_poll))