make event units public in the api

Add grail_get_units() to the api, so so that applications can
extract the min/max coordinates used in the gesture events.

Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/grail-gestures.h b/src/grail-gestures.h
index 57204ad..663d357 100644
--- a/src/grail-gestures.h
+++ b/src/grail-gestures.h
@@ -43,8 +43,7 @@ struct move_model {
         grail_time_t time;
 };
 
-void gru_init_motion(struct grail *ge,
-                     const struct touch_dev_caps *caps);
+void gru_init_motion(struct grail *ge);
 void gru_motion(struct grail *ge,
                 const struct touch_frame *frame);
 void gru_event(struct grail *ge, int gid,