Fix compile error (ISTG this time)

Author: neon-nyan

SharedStatic.V1Ext_Update2.cs

@@ -45,6 +45,11 @@ private static unsafe HResult GetCurrentDiscordPresenceInfo(void* presetConfigP,
             IPluginPresetConfig? presetConfig = ComInterfaceMarshaller<IPluginPresetConfig>.ConvertToManaged((void*)presetConfigP);
 #endif
 
+            if (presetConfig == null)
+            {
+                return false;
+            }
+
             DiscordPresenceExtension.DiscordPresenceContext context = new(presetConfig);
 
             if (presenceInfoP == null)

Utility/Json/JsonSerializerExtension.cs

@@ -9,6 +9,10 @@
 using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
 
+#if !DEBUG
+using System.Net.Http.Json;
+#endif
+
 namespace Hi3Helper.Plugin.Core.Utility.Json;
 
 public static class JsonSerializerExtension