On some platforms, nested braces are required for nested initializers,
or a warning will be produced which is treated as an error.

Change-Id: I4806ee13869bfe5c5c41505552cd03ff6bdde85e
Reviewed-on: https://swiftshader-review.googlesource.com/20248Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>