(output_type): The "base type" of a SET_TYPE is its DOMAIN_TYPE, not

its TREE_TYPE.

From-SVN: r6210

gcc/dwarfout.c

@@ -3994,7 +3994,7 @@ output_type (type, containing_scope)
 	break;
 
       case SET_TYPE:
-	output_type (TREE_TYPE (type), containing_scope);
+	output_type (TYPE_DOMAIN (type), containing_scope);
 	output_die (output_set_type_die, type);
 	break;