[graphite2] Fix warning

diff --git a/src/hb-graphite2.cc b/src/hb-graphite2.cc
index 6eb34b0ea11e87a417d79b4f386a3240eb1f0029..9e0761e63d186b475faf1d48ba06f8755e550e82 100644 (file)
--- a/src/hb-graphite2.cc
+++ b/src/hb-graphite2.cc
@@ -366,7 +366,7 @@ _hb_graphite2_shape (hb_shape_plan_t    *shape_plan,
   float yscale = (float) font->y_scale / upem;
   yscale *= yscale / xscale;
   /* Positioning. */
-  int currclus = -1;
+  unsigned int currclus = (unsigned int) -1;
   const hb_glyph_info_t *info = buffer->info;
   hb_glyph_position_t *pPos = hb_buffer_get_glyph_positions (buffer, NULL);
   if (!HB_DIRECTION_IS_BACKWARD(buffer->props.direction))