From 515ebee32b1a40a7822f98e965bb8b81651f8b5e Mon Sep 17 00:00:00 2001
From: Christoph Ruegg <git@cdrnet.ch>
Date: Mon, 14 Apr 2014 10:26:07 +0200
Subject: [PATCH] LA: vector storage copy zero-length subset should skip
 instead of fail

---
 .../LinearAlgebra/Storage/VectorStorage.cs        | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs b/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs
index ff924a63..7f54486d 100644
--- a/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs
+++ b/src/Numerics/LinearAlgebra/Storage/VectorStorage.cs
@@ -278,6 +278,11 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
                 throw new ArgumentNullException("target");
             }
 
+            if (count == 0)
+            {
+                return;
+            }
+
             ValidateSubVectorRange(target, sourceIndex, targetIndex, count);
             CopySubVectorToUnchecked(target, sourceIndex, targetIndex, count, skipClearing);
         }
@@ -318,6 +323,11 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
                 throw new ArgumentNullException("target");
             }
 
+            if (columnCount == 0)
+            {
+                return;
+            }
+
             ValidateSubRowRange(target, rowIndex, sourceColumnIndex, targetColumnIndex, columnCount);
             CopyToSubRowUnchecked(target, rowIndex, sourceColumnIndex, targetColumnIndex, columnCount, skipClearing);
         }
@@ -343,6 +353,11 @@ namespace MathNet.Numerics.LinearAlgebra.Storage
                 throw new ArgumentNullException("target");
             }
 
+            if (rowCount == 0)
+            {
+                return;
+            }
+
             ValidateSubColumnRange(target, columnIndex, sourceRowIndex, targetRowIndex, rowCount);
             CopyToSubColumnUnchecked(target, columnIndex, sourceRowIndex, targetRowIndex, rowCount, skipClearing);
         }