* src/frame.h (struct frame): Remove HAVE_WINDOW_SYSTEM
around last_tab_bar_item.
/* Cache of realized faces. */
struct face_cache *face_cache;
-#if defined (HAVE_WINDOW_SYSTEM)
/* Tab-bar item index of the item on which a mouse button was pressed. */
int last_tab_bar_item;
-#endif
#if defined (HAVE_WINDOW_SYSTEM) && ! defined (HAVE_EXT_TOOL_BAR)
/* Tool-bar item index of the item on which a mouse button was pressed. */