[hb-view] Work around old cairo

Fixes https://github.com/harfbuzz/harfbuzz/issues/4378

util/view-cairo.hh

diff --git a/util/view-cairo.hh b/util/view-cairo.hh
index d737b85..b44b77b 100644
--- a/util/view-cairo.hh
+++ b/util/view-cairo.hh
@@ -202,6 +202,8 @@
       cairo_restore (cr);
     }
 
+  // https://github.com/harfbuzz/harfbuzz/issues/4378
+#if CAIRO_VERSION >= 11700
     if (l.num_clusters)
       cairo_show_text_glyphs (cr,
 			      l.utf8, l.utf8_len,
@@ -209,6 +211,7 @@
 			      l.clusters, l.num_clusters,
 			      l.cluster_flags);
     else
+#endif
       cairo_show_glyphs (cr, l.glyphs, l.num_glyphs);
   }