tests: Store the pointer event serial

Store the pointer serial for events that provide one, so that it can be
used by tests to send requests that require it (e.g., setting the cursor
surface).

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>

tests/weston-test-client-helper.c

@@ -130,6 +130,7 @@ pointer_handle_enter(void *data, struct wl_pointer *wl_pointer,
 	else
 		pointer->focus = NULL;
 
+	pointer->serial = serial;
 	pointer->x = wl_fixed_to_int(x);
 	pointer->y = wl_fixed_to_int(y);
 
@@ -143,6 +144,7 @@ pointer_handle_leave(void *data, struct wl_pointer *wl_pointer,
 {
 	struct pointer *pointer = data;
 
+	pointer->serial = serial;
 	pointer->focus = NULL;
 
 	testlog("test-client: got pointer leave, surface %p\n",
@@ -172,6 +174,7 @@ pointer_handle_button(void *data, struct wl_pointer *wl_pointer,
 {
 	struct pointer *pointer = data;
 
+	pointer->serial = serial;
 	pointer->button = button;
 	pointer->state = state;
 	pointer->button_time_msec = time_msec;

tests/weston-test-client-helper.h

@@ -99,6 +99,7 @@ struct input {
 struct pointer {
 	struct wl_pointer *wl_pointer;
 	struct surface *focus;
+	uint32_t serial;
 	int x;
 	int y;
 	uint32_t button;