WaE vs2015 literal implicit casting

Change-Id: Ib3da0dd36243fbd316992e9fa88f4bed37b24f6a
Reviewed-on: https://gerrit.libreoffice.org/22596
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
diff --git a/vcl/source/gdi/octree.cxx b/vcl/source/gdi/octree.cxx
index e56f3d3..81ba003 100644
--- a/vcl/source/gdi/octree.cxx
+++ b/vcl/source/gdi/octree.cxx
@@ -233,10 +233,10 @@ void Octree::GetPalIndex( NODE* pNode )
InverseColorMap::InverseColorMap( const BitmapPalette& rPal ) :
            nBits( 8 - OCTREE_BITS )
{
    const sal_uLong     nColorMax = 1 << OCTREE_BITS;
    const sal_uLong     xsqr = 1 << ( nBits << 1 );
    const sal_uLong     xsqr2 = xsqr << 1;
    const sal_uLong     nColors = rPal.GetEntryCount();
    const int     nColorMax = 1 << OCTREE_BITS;
    const long     xsqr = 1L << ( nBits << 1 );
    const long     xsqr2 = xsqr << 1;
    const int     nColors = rPal.GetEntryCount();
    const long      x = 1L << nBits;
    const long      x2 = x >> 1L;
    sal_uLong           r, g, b;
@@ -244,7 +244,7 @@ InverseColorMap::InverseColorMap( const BitmapPalette& rPal ) :

    ImplCreateBuffers( nColorMax );

    for( sal_uLong nIndex = 0; nIndex < nColors; nIndex++ )
    for( int nIndex = 0; nIndex < nColors; nIndex++ )
    {
        const BitmapColor&  rColor = rPal[ (sal_uInt16) nIndex ];
        const long          cRed = rColor.GetRed();