NDArray.ExpandEllipsis changed to static

Author: Nucs

src/NumSharp.Core/Selection/NDArray.Indexing.Selection.Getter.cs

@@ -129,7 +129,7 @@ private NDArray FetchIndices(object[] indicesObjects)
 
                         if (o.IsEllipsis)
                         {
-                            indicesObjects = ExpandEllipsis(indicesObjects).ToArray();
+                            indicesObjects = ExpandEllipsis(indicesObjects, @this.ndim).ToArray();
                             //TODO: i think we need to set here indicesLen = indicesObjects.Length
                             continue;
                         }

src/NumSharp.Core/Selection/NDArray.Indexing.Selection.Setter.cs

@@ -142,7 +142,7 @@ protected void SetIndices(object[] indicesObjects, NDArray values)
 
                         if (o.IsEllipsis)
                         {
-                            indicesObjects = ExpandEllipsis(indicesObjects).ToArray();
+                            indicesObjects = ExpandEllipsis(indicesObjects, @this.ndim).ToArray();
                             //TODO: i think we need to set here indicesLen = indicesObjects.Length
                             continue;
                         }

src/NumSharp.Core/Selection/NDArray.Indexing.Selection.cs

@@ -12,7 +12,7 @@ namespace NumSharp
 {
     public partial class NDArray
     {
-        protected IEnumerable<object> ExpandEllipsis(object[] ndarrays)
+        protected static IEnumerable<object> ExpandEllipsis(object[] ndarrays, int ndim)
         {
             // count dimensions without counting ellipsis or newaxis
             var count = ndarrays.OfType<Slice>().Count(slice => !(slice.IsNewAxis || slice.IsEllipsis));