gstplugin: Fix for UWP build
SetThreadErrorMode() API is available on UWP but flag values are desktop API only. Since error dialogs don't exist on UWP, we don't need to suppress it Part-of: <gstreamer/gstreamer!1569>
SetThreadErrorMode() API is available on UWP but flag values are desktop API only. Since error dialogs don't exist on UWP, we don't need to suppress it Part-of: <gstreamer/gstreamer!1569>