Bug#968637: freeimage: FTBFS against libraw 0.20.0

[peter green]

tags 968637 +patch
thanks

On 26/08/2020 06:04, peter green wrote:
> Upstream seem to have a fix for this.
> 
> https://sourceforge.net/p/freeimage/svn/1842/

I was able to succesfully apply the upstream change to the
Debian package and built it in Raspbian bullseye-staging .
I also bumped the build-dependency because it was not clear
to me what impact the changes would have on operation with
previous libraw versions.

A debdiff should appear soon at
https://debdiffs.raspbian.org/main/f/freeimage/

I may or may not NMU this later.