9.52 Transparency broken

[Bruno Voisin]

Same experience as Uwe Siart reported: compared with 9.51, Ghostscript 9.52, released yesterday, includes a fix allowing the libgs library (used by dvisvgm) to be built on macOS, but nothing for transparency.

There's a potential fix described at

https://bugs.ghostscript.com/show_bug.cgi?id=702219

I tried and it works, but it's pending review and commit.

Bruno Voisin