meson: define inc_gbm as empty if not otherwise assigned
authorDylan Baker <dylan@pnwbakers.com>
Wed, 3 Jan 2018 20:33:55 +0000 (12:33 -0800)
committerDylan Baker <dylan@pnwbakers.com>
Thu, 11 Jan 2018 23:40:02 +0000 (15:40 -0800)
commit5fcadaec80c97a1df280b7bab01c271e323a468a
treedab02b2920699c9551660ee6c5020e521bb597d9
parenta0a764cde5a0f469a1d3f04babb84268c26cf70c
meson: define inc_gbm as empty if not otherwise assigned

Otherwise this could be undefined in the egl directory.

Signed-off-by: Dylan Baker <dylan.c.baker@intel.com>
Acked-by: Eric Engestrom <eric.engestrom@imgtec.com>
src/meson.build