[fonttools/fonttools] 61160f: [cffLib.specializer] Fix generalizer blend

[Behdad Esfahbod]

Branch: refs/heads/main
Home: https://github.com/fonttools/fonttools
Commit: 61160fe5db0962d1148cde648f7a7a15d23712d9
https://github.com/fonttools/fonttools/commit/61160fe5db0962d1148cde648f7a7a15d23712d9
Author: Behdad Esfahbod <beh...@behdad.org>
Date: 2022-08-17 (Wed, 17 Aug 2022)

Changed paths:
M Lib/fontTools/cffLib/specializer.py
M Lib/fontTools/varLib/cff.py

Log Message:
-----------
[cffLib.specializer] Fix generalizer blend

Fixes https://github.com/fonttools/fonttools/issues/1975