Clang warns if there are missing braces around a subobject
initializer. The most common idiom that triggers this is:
STRUCT s = {0};
which can be more simply written as:
STRUCT s = {};

BUG=505297

Change-Id: Ib4513ee195d43e7c4a4a2f46c328866f0023a2a5
Reviewed-on: https://chromium-review.googlesource.com/282921Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Kenneth Russell <kbr@chromium.org>