ci: fix for msys2

Author: jcelerier

include/libremidi/backends/winmidi/midi_in.hpp

@@ -35,7 +35,7 @@ class midi_in_impl final
         return E_POINTER;
 
       if (riid == __uuidof(IUnknown) ||
-          riid == __uuidof(IMidiEndpointConnectionMessagesReceivedCallback))
+          riid == IID_IMidiEndpointConnectionMessagesReceivedCallback)
       {
         *ppvObject = static_cast<IMidiEndpointConnectionMessagesReceivedCallback*>(this);
         AddRef();
@@ -113,7 +113,7 @@ class midi_in_impl final
       process_message(args);
     });
 #else
-    m_raw_endpoint = m_endpoint.as<IMidiEndpointConnectionRaw>();
+    m_endpoint.as(IID_IMidiEndpointConnectionRaw, m_raw_endpoint.put_void());
 
     m_raw_endpoint->SetMessagesReceivedCallback(
         &raw_callback

include/libremidi/backends/winmidi/midi_out.hpp

@@ -48,7 +48,7 @@ class midi_out_impl final
 
     m_endpoint = m_session.CreateEndpointConnection(ep.EndpointDeviceId());
 #if LIBREMIDI_WINMIDI_HAS_COM_EXTENSIONS
-    m_raw_endpoint = m_endpoint.as<IMidiEndpointConnectionRaw>();
+    m_endpoint.as(IID_IMidiEndpointConnectionRaw, m_raw_endpoint.put_void());
   #endif
     m_endpoint.Open();
 

include/libremidi/backends/winuwp/helpers.hpp

@@ -7,6 +7,7 @@
 #include <string>
 #include <thread>
 #include <vector>
+#include <unknwn.h>
 
 #include <winrt/Windows.Devices.Enumeration.h>
 #include <winrt/Windows.Devices.Midi.h>