[PATCH] Fix bug in quirk_rust_enum

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tromey@adacore.com> writes:

Tom> gdb/ChangeLog
Tom> 2020-06-19  Tom Tromey  <tromey@adacore.com>

Tom> 	* dwarf2/read.c (quirk_rust_enum): Correctly call
Tom> 	alloc_rust_variant for default-less enum.

I'm checking this in now.

Tom