compiler: fix brace formatting
compiler: fix brace formatting

Just happened to notice this one.

Change-Id: I53c3183e28eaec30eb702f0101b8ac208b23895f
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/197698
Reviewed-by: Than McIntosh <4b2922593166fc595a9b1a408f34f5d3817fe9d2@google.com>
Reviewed-by: Cherry Zhang <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>

golang/gofrontend,golang/gofrontend,golang/gofrontend,golang/gofrontend