re PR c++/51917 (g++.old-deja/g++.abi/vmihint.C FAILs)

	PR c++/51917
	* decl.c (xref_basetypes): Check VEC_length instead of VEC_space.

From-SVN: r183509

gcc/cp/ChangeLog

 2012-01-24  Jason Merrill  <jason@redhat.com>
 
+	PR c++/51917
+	* decl.c (xref_basetypes): Check VEC_length instead of VEC_space.
+
 	PR c++/51973
 	* tree.c (called_fns_equal): Check template args.
 	(cp_tree_equal): Call it.

gcc/cp/decl.c

@@ -11916,8 +11916,8 @@ xref_basetypes (tree ref, tree base_list)
       BINFO_BASE_ACCESS_APPEND (binfo, access);
     }
 
-  if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
-    /* If we have space in the vbase vector, we must have shared at
+  if (VEC_length (tree, CLASSTYPE_VBASECLASSES (ref)) < max_vbases)
+    /* If we didn't get max_vbases vbases, we must have shared at
        least one of them, and are therefore diamond shaped.  */
     CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;