Fix the build (#2682)

Author: yaeldMS

src/Microsoft.ML.ImageAnalytics/VectorToImageTransform.cs

@@ -252,7 +252,7 @@ private static (string outputColumnName, string inputColumnName)[] GetColumnPair
 
         private protected override IRowMapper MakeRowMapper(DataViewSchema schema) => new Mapper(this, schema);
 
-        protected override void CheckInputColumn(DataViewSchema inputSchema, int col, int srcCol)
+        private protected override void CheckInputColumn(DataViewSchema inputSchema, int col, int srcCol)
         {
             var inputColName = _columns[col].InputColumnName;
             var vectorType = inputSchema[srcCol].Type as VectorType;
@@ -443,7 +443,7 @@ internal ColumnInfo(VectorToImageConvertingTransformer.Column item, VectorToImag
                 Contracts.CheckUserArg(FloatUtils.IsFiniteNonZero(Scale), nameof(item.Scale));
             }
 
-            public ColumnInfo(string outputColumnName, string inputColumnName, ModelLoadContext ctx)
+            internal ColumnInfo(string outputColumnName, string inputColumnName, ModelLoadContext ctx)
             {
                 Contracts.AssertNonEmpty(outputColumnName);
                 Contracts.AssertNonEmpty(inputColumnName);