[dia] C++ guards for group.h

[Hans Breuer <hans src gnome org>]

commit 7d5cffa852add4e5672e731a75ab329026f1bbed
Author: Hans Breuer <hans breuer org>
Date:   Sun Jan 19 11:56:22 2014 +0100

    C++ guards for group.h

 lib/group.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/lib/group.h b/lib/group.h
index 2857358..e3022bb 100644
--- a/lib/group.h
+++ b/lib/group.h
@@ -21,6 +21,8 @@
 #include "diavar.h"
 #include "object.h"
 
+G_BEGIN_DECLS
+
 extern DIAVAR DiaObjectType group_type;
 
 /* Make sure there are no connections from objects to objects
@@ -34,4 +36,6 @@ void group_destroy_shallow(DiaObject *group);
 void group_transform (Group *group, const DiaMatrix *mat);
 #define IS_GROUP(obj) ((obj)->type == &group_type)
 
+G_END_DECLS
+
 #endif /* GROUP_H */