main/version: make sure all the output variables get set in get_gl_override

This fixes 2 warnings in gcc 5.1.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Martin Peres <martin.peres@linux.intel.com>
1 file changed