Fix SunStudio 12.6 build (#1053)

src/hb-face.cc

@@ -514,7 +514,7 @@ hb_face_get_table_tags (hb_face_t    *face,
 			unsigned int *table_count, /* IN/OUT */
 			hb_tag_t     *table_tags /* OUT */)
 {
-  if (face->destroy != _hb_face_for_data_closure_destroy)
+  if (face->destroy != (hb_destroy_func_t) _hb_face_for_data_closure_destroy)
   {
     if (table_count)
       *table_count = 0;

src/hb-private.hh

@@ -147,7 +147,7 @@ extern "C" void  hb_free_impl(void *ptr);
 #define HB_FUNC __func__
 #endif
 
-#ifdef __SUNPRO_CC
+#if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5140)
 /* https://github.com/harfbuzz/harfbuzz/issues/630 */
 #define __restrict
 #endif