Stack alignment in abc::exception::inject_in_context() under x86-64 seems unnecessary and even harmful
Stack alignment in abc::exception::inject_in_context() under x86-64 seems unnecessary and even harmful

Causes infinite segfaults under Linux/glibc with G++ -O2, which don’t
happen with this commit or with -O0.

raffaellod/lofty,raffaellod/lofty