Merge pull request #984 from Azaezel/mBitsPerChannel_match_DX_OGL

const U64 maxValPerChannel = (U64)1 << mBitsPerChannel;

Engine/source/lighting/advanced/glsl/gBufferConditionerGLSL.cpp

@@ -333,7 +333,7 @@ Var* GBufferConditionerGLSL::_conditionOutput( Var *unconditionedOutput, MultiLi
    // Encode depth into two channels
    if(mNormalStorageType != CartesianXYZ)
    {
-      const U64 maxValPerChannel = 1 << mBitsPerChannel;
+       const U64 maxValPerChannel = (U64)1 << mBitsPerChannel;
       meta->addStatement( new GenOp( "   \r\n   // Encode depth into hi/lo\r\n" ) );
       meta->addStatement( new GenOp( avar( "   float2 _tempDepth = frac(@.a * float2(1.0, %llu.0));\r\n", maxValPerChannel - 1 ), 
          unconditionedOutput ) );