From 83e61ff4702121d3418fe82a8fe7ef6bb63bb5d2 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 16 Apr 2009 12:30:51 -0400
Subject: [PATCH] [GSUB] Fix reverse lookup loop like we did in the old code
 before

---
 src/hb-ot-layout-gsub-private.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-ot-layout-gsub-private.h b/src/hb-ot-layout-gsub-private.h
index 968dd4a4d..b607ca537 100644
--- a/src/hb-ot-layout-gsub-private.h
+++ b/src/hb-ot-layout-gsub-private.h
@@ -808,7 +808,7 @@ struct SubstLookup : Lookup {
 	  else
 	    buffer->in_pos--;
 
-	} while (buffer->in_pos);
+	} while ((int) buffer->in_pos >= 0);
     }
 
     return ret;