tests/kms_vrr: fix compilation with Clang

Clang fails to compile this file with this error:

    ../tests/kms_vrr.c:203:20: error: suggest braces around
initialization of subobject [-Werror,-Wmissing-braces]
            drmVBlank vbl = { 0 };
                              ^
                              {}

As discussed in [1], using an empty initializer list is the preferred
way to fix this.

[1]: https://lists.freedesktop.org/archives/igt-dev/2019-March/010841.html

Signed-off-by: Simon Ser <simon.ser@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>

0 files changed, 0 insertions, 0 deletions