st/gui: Fix warning (false positive)

src/xrt/state_trackers/gui/gui_scene_tracking_overrides.c

@@ -212,7 +212,7 @@ scene_render(struct gui_scene *scene, struct gui_program *p)
 		struct xrt_tracking_override *o = &ts->overrides[ts->editing_override];
 
 		igBegin("Tracker Device Offset", NULL, 0);
-		int target, tracker;
+		int target = 0, tracker = 0;
 		if (get_indices(p, ts, o, &target, &tracker)) {
 			igText("Editing %s [%s] <- %s [%s]", p->xdevs[target]->str, o->target_device_serial,
 			       p->xdevs[tracker]->str, o->tracker_device_serial);