Add the conceal patch from Vince Negri.
diff --git a/src/option.h b/src/option.h
index f0ebc8d..489bdb2 100644
--- a/src/option.h
+++ b/src/option.h
@@ -1021,6 +1021,12 @@
 #ifdef FEAT_ARABIC
     , WV_ARAB
 #endif
+#ifdef FEAT_CONCEAL
+    , WV_CONCEAL
+#endif
+#ifdef FEAT_CURSORBIND
+    , WV_CRBIND
+#endif
 #ifdef FEAT_DIFF
     , WV_DIFF
 #endif