abg-fwd.h: fix mismatched tags for ir_node_visitor

ir_node_visitor is defined as `class` in include/abg-ir.h:4429 and
should therefore also be forward-declared as such.

 * include/abg-fwd.h: forward-declare ir_node_visitor as class

Signed-off-by: Matthias Maennich <maennich@google.com>

diff --git a/include/abg-fwd.h b/include/abg-fwd.h
index 4625841..82d91fe 100644 (file)
--- a/include/abg-fwd.h
+++ b/include/abg-fwd.h
@@ -87,7 +87,7 @@ typedef shared_ptr<corpus_group> corpus_group_sptr;
 
 // Forward declarations for ir.
 
-struct ir_node_visitor;
+class  ir_node_visitor;
 
 struct ir_traversable_base;