Set ErrorCategory when git_error_last returns a valid error

Restore the corresponding constructor in LibGit2SharpException

Co-authored-by: Marcell van Rooyen <marcell.van.rooyen@mendix.com>

Author: Alexander Ovchinnikov

LibGit2Sharp/Core/Ensure.cs

@@ -143,12 +143,13 @@ private static unsafe void HandleError(int result)
             else
             {
                 errorMessage = LaxUtf8Marshaler.FromNative(error->Message);
+                errorCategory = error->Category;
             }
 
             Func<string, GitErrorCategory, LibGit2SharpException> exceptionBuilder;
             if (!GitErrorsToLibGit2SharpExceptions.TryGetValue((GitErrorCode)result, out exceptionBuilder))
             {
-                exceptionBuilder = (m, c) => new LibGit2SharpException(m, c);
+                exceptionBuilder = (m, c) => new LibGit2SharpException(m, (GitErrorCode)result, c);
             }
 
             throw exceptionBuilder(errorMessage, errorCategory);

LibGit2Sharp/LibGit2SharpException.cs

@@ -52,5 +52,11 @@ public LibGit2SharpException(string format, params object[] args)
         protected LibGit2SharpException(SerializationInfo info, StreamingContext context)
             : base(info, context)
         { }
+
+        internal LibGit2SharpException(string message, GitErrorCode code, GitErrorCategory category) : this(message)
+        {
+            Data.Add("libgit2.code", (int)code);
+            Data.Add("libgit2.category", (int)category);
+        }
     }
 }