[PATCH weston] input: Use slightly less obscure logic in evdev_notify_keyboard_focus()

[Derek Foreman]

While the test is actually correct (for non-negative numbers), it's not
at all clear and seems to be an accidental order of operations mistake.

Also, add an assert() to make sure this number is never negative.

Closes bug 86346 - https://bugs.freedeskto.org/show_bug.cgi?id=86346

Signed-off-by: Derek Foreman <derekf at osg.samsung.com>
---
 src/input.c           | 1 +
 src/libinput-device.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/input.c b/src/input.c
index 5f19875..6784ead 100644
--- a/src/input.c
+++ b/src/input.c
@@ -2209,6 +2209,7 @@ weston_seat_release_keyboard(struct weston_seat *seat)
 		weston_keyboard_reset_state(seat->keyboard);
 		seat_send_updated_caps(seat);
 	}
+	assert(seat->keyboard_device_count >= 0);
 }
 
 WL_EXPORT void
diff --git a/src/libinput-device.c b/src/libinput-device.c
index 0e3f46d..8a48905 100644
--- a/src/libinput-device.c
+++ b/src/libinput-device.c
@@ -470,7 +470,7 @@ evdev_notify_keyboard_focus(struct weston_seat *seat,
 {
 	struct wl_array keys;
 
-	if (!seat->keyboard_device_count > 0)
+	if (seat->keyboard_device_count == 0)
 		return;
 
 	wl_array_init(&keys);
-- 
2.1.1