DebugPrintD3DError macro should print error code in HEX instead of deicmal form

All d3d errors can be easier found in hex form:

- TraceLn1(NWT_TRACE_ERROR, "D3D Error: " ## msg ## " res=%d", res)
+ TraceLn1(NWT_TRACE_ERROR, "D3D Error: " ## msg ## " res=0x%08X", res)