Fixed bug where the dense matrix was not passed by reference

Source/Math/CPUSparseMatrix.cpp

@@ -392,7 +392,7 @@ CPUSparseMatrix<ElemType> CPUSparseMatrix<ElemType>::ColumnSlice(size_t startCol
 }
 
 template <class ElemType>
-void CPUSparseMatrix<ElemType>::AssignColumnSliceToDense(CPUMatrix<ElemType> slice, size_t startColumn, size_t numCols) const
+void CPUSparseMatrix<ElemType>::AssignColumnSliceToDense(CPUMatrix<ElemType>& slice, size_t startColumn, size_t numCols) const
 {
     if (startColumn + numCols > m_numCols)
         InvalidArgument("The slice (%d+%d) is out of range of the source matrix (%d).", (int) startColumn, (int) numCols, (int) m_numCols);

Source/Math/CPUSparseMatrix.h

@@ -98,7 +98,7 @@ public:
 
     CPUSparseMatrix<ElemType> ColumnSlice(size_t startColumn, size_t numCols) const;
     CPUMatrix<ElemType> CopyColumnSliceToDense(size_t startColumn, size_t numCols) const;
-    void AssignColumnSliceToDense(CPUMatrix<ElemType> slice, size_t startColumn, size_t numCols) const;
+    void AssignColumnSliceToDense(CPUMatrix<ElemType>& slice, size_t startColumn, size_t numCols) const;
 
     CPUMatrix<ElemType> DiagonalToDense() const;
 

Source/Math/GPUSparseMatrix.cu

@@ -2168,7 +2168,7 @@ GPUSparseMatrix<ElemType> GPUSparseMatrix<ElemType>::ColumnSlice(size_t startCol
 
     
 template <class ElemType>
-void GPUSparseMatrix<ElemType>::AssignColumnSliceToDense(GPUMatrix<ElemType> slice, size_t startColumn, size_t numCols) const
+void GPUSparseMatrix<ElemType>::AssignColumnSliceToDense(GPUMatrix<ElemType>& slice, size_t startColumn, size_t numCols) const
 {
     int m = (int) GetNumRows();
     int n = (int) GetNumCols();

Source/Math/GPUSparseMatrix.h

@@ -306,7 +306,7 @@ public:
 
     GPUSparseMatrix<ElemType> ColumnSlice(size_t startColumn, size_t numCols) const;
     GPUMatrix<ElemType> CopyColumnSliceToDense(size_t startColumn, size_t numCols) const;
-    void AssignColumnSliceToDense(GPUMatrix<ElemType> slice, size_t startColumn, size_t numCols) const;
+    void AssignColumnSliceToDense(GPUMatrix<ElemType>& slice, size_t startColumn, size_t numCols) const;
 
     GPUMatrix<ElemType> DiagonalToDense() const;