Use [x]zalloc instead of [x]malloc + memset

Signed-off-by: Ryo Munakata <ryomnktml@gmail.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>

clients/editor.c

@@ -687,8 +687,7 @@ text_entry_create(struct editor *editor, const char *text)
 {
 	struct text_entry *entry;
 
-	entry = xmalloc(sizeof *entry);
-	memset(entry, 0, sizeof *entry);
+	entry = xzalloc(sizeof *entry);
 
 	entry->widget = widget_add_widget(editor->widget, entry);
 	entry->window = editor->window;

clients/subsurfaces.c

@@ -498,8 +498,7 @@ triangle_create(struct window *window, struct egl_state *egl)
 {
 	struct triangle *tri;
 
-	tri = xmalloc(sizeof *tri);
-	memset(tri, 0, sizeof *tri);
+	tri = xzalloc(sizeof *tri);
 
 	tri->egl = egl;
 	tri->widget = window_add_subsurface(window, tri,
@@ -720,8 +719,7 @@ demoapp_create(struct display *display)
 {
 	struct demoapp *app;
 
-	app = xmalloc(sizeof *app);
-	memset(app, 0, sizeof *app);
+	app = xzalloc(sizeof *app);
 
 	app->egl = egl_state_create(display_get_display(display));
 

fullscreen-shell/fullscreen-shell.c

@@ -142,10 +142,9 @@ seat_created(struct wl_listener *l, void *data)
 	struct weston_seat *seat = data;
 	struct pointer_focus_listener *listener;
 
-	listener = malloc(sizeof *listener);
+	listener = zalloc(sizeof *listener);
 	if (!listener)
 		return;
-	memset(listener, 0, sizeof *listener);
 
 	listener->shell = container_of(l, struct fullscreen_shell,
 				       seat_created_listener);
@@ -251,10 +250,9 @@ fs_output_create(struct fullscreen_shell *shell, struct weston_output *output)
 {
 	struct fs_output *fsout;
 
-	fsout = malloc(sizeof *fsout);
+	fsout = zalloc(sizeof *fsout);
 	if (!fsout)
 		return NULL;
-	memset(fsout, 0, sizeof *fsout);
 
 	fsout->shell = shell;
 	wl_list_insert(&shell->output_list, &fsout->link);
@@ -805,11 +803,10 @@ module_init(struct weston_compositor *compositor,
 	struct weston_seat *seat;
 	struct weston_output *output;
 
-	shell = malloc(sizeof *shell);
+	shell = zalloc(sizeof *shell);
 	if (shell == NULL)
 		return -1;
 
-	memset(shell, 0, sizeof *shell);
 	shell->compositor = compositor;
 
 	shell->client_destroyed.notify = client_destroyed;