Minor
diff --git a/src/hb-ot-layout-gsubgpos-private.hh b/src/hb-ot-layout-gsubgpos-private.hh
index 7ccbdf0..8be4312 100644
--- a/src/hb-ot-layout-gsubgpos-private.hh
+++ b/src/hb-ot-layout-gsubgpos-private.hh
@@ -39,6 +39,13 @@
#define lig_id() var2.u16[0] /* unique ligature id */
#define lig_comp() var2.u16[1] /* component number in the ligature (0 = base) */
+static inline uint16_t allocate_lig_id (hb_buffer_t *buffer) {
+ uint16_t lig_id = buffer->next_serial ();
+ if (unlikely (!lig_id)) lig_id = buffer->next_serial (); /* in case of overflow */
+ return lig_id;
+}
+
+
#ifndef HB_DEBUG_APPLY
#define HB_DEBUG_APPLY (HB_DEBUG+0)
