[PATCH 0/4] MR8401: gdi32: Use the maximum number of colours when biClrUsed is zero.

[Zhiyi Zhang (＠zhiyi)]

Fix a regression from 225004e1. According to MSDN, if the biClrUsed field is zero, the bitmap should
use the maximum number of colours corresponding to the value of the biBitCount member for the
compression mode specified by biCompression.