kconfig: Add print_title helper in lxdialog

Simplify check for long title and use a helper function in util.c

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/lxdialog/checklist.c b/scripts/lxdialog/checklist.c
index ae40a2b..3fb681f 100644
--- a/scripts/lxdialog/checklist.c
+++ b/scripts/lxdialog/checklist.c
@@ -158,20 +158,7 @@
 	wattrset(dialog, dialog_attr);
 	waddch(dialog, ACS_RTEE);
 
-	if (title != NULL && strlen(title) >= width - 2) {
-		/* truncate long title -- mec */
-		char *title2 = malloc(width - 2 + 1);
-		memcpy(title2, title, width - 2);
-		title2[width - 2] = '\0';
-		title = title2;
-	}
-
-	if (title != NULL) {
-		wattrset(dialog, title_attr);
-		mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
-		waddstr(dialog, (char *)title);
-		waddch(dialog, ' ');
-	}
+	print_title(dialog, title, width);
 
 	wattrset(dialog, dialog_attr);
 	print_autowrap(dialog, prompt, width - 2, 1, 3);