Update error codes

Author: nulltoken

LibGit2Sharp/Core/GitErrorCode.cs

@@ -25,14 +25,24 @@ internal enum GitErrorCode
         /// </summary>
         Buffer = -6,
 
+        /// <summary>
+        ///   Callback error.
+        /// </summary>
+        User = -7,
+
+        /// <summary>
+        ///   Operation cannot be performed against a bare repository.
+        /// </summary>
+        BareRepo = -8,
+
         /// <summary>
         ///   Skip and passthrough the given ODB backend.
         /// </summary>
         PassThrough = -30,
 
         /// <summary>
-        ///   The revision walker is empty; there are no more commits left to iterate.
+        ///   There are no more entries left to iterate.
         /// </summary>
-        RevWalkOver = -31,
+        IterOver = -31,
     }
 }

LibGit2Sharp/Core/Proxy.cs

@@ -1269,7 +1269,7 @@ public static ObjectId git_revwalk_next(RevWalkerSafeHandle walker)
                 GitOid ret;
                 int res = NativeMethods.git_revwalk_next(out ret, walker);
 
-                if (res == (int)GitErrorCode.RevWalkOver)
+                if (res == (int)GitErrorCode.IterOver)
                 {
                     return null;
                 }