msrle32: Use the correct number of colors when biClrUsed = 0 (try 2)

[Bruno Jesus]

On Tuesday, March 15, 2016, Alexandre Julliard <julliard(a)winehq.org
<javascript:_e(%7B%7D,'cvml','julliard(a)winehq.org');>> wrote:
> Bruno Jesus <00cpxxx(a)gmail.com> writes:
> > @@ -1647,27 +1655,33 @@ static LRESULT DecompressBegin(CodecInfo *pi,
> > LPCBITMAPINFOHEADER lpbiIn,
> >
> > if (lpbiIn->biCompression != BI_RGB)
> >    {
> > +    int colors;
> > +
> > +    if (lpbiIn->biClrUsed == 0)
> > +      colors = 1 << lpbiIn->biBitCount;
> > +    else
> > +      colors = lpbiIn->biClrUsed;
>
> I don't think you want to do that for biBitCount > 8.

I'm not near the source code now but AFAIR DecompressQuery would refuse
such bitmap because it does not support biClrUsed > 0 when bit count > 8.
But I will clarify that in a third version, certainly it would be a waste
of memory to allocate memory unnecessarely.