compiler: Don't make void-typed temporaries.
compiler: Don't make void-typed temporaries.

Fixes golang/go#11568.

Change-Id: Ic1384bcb770a959320808c847bf0e8e12380a659
Reviewed-on: https://go-review.googlesource.com/12653
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

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