Update the key symbol if the composing ends.

i3lock.c

@@ -334,7 +334,7 @@ static void handle_key_press(xcb_key_press_event_t *event) {
             /* xkb_compose_state_get_utf8 doesn't include the terminating byte in the return value
              * as xkb_keysym_to_utf8 does. Adding one makes the variable n consistent. */
             n = xkb_compose_state_get_utf8(xkb_compose_state, buffer, sizeof(buffer)) + 1;
-            //ksym = xkb_compose_state_get_one_sym(xkb_compose_state); // Not sure if it's needed
+            ksym = xkb_compose_state_get_one_sym(xkb_compose_state);
             composed = true;
             break;
         case XKB_COMPOSE_CANCELLED: