libvaladoc: Fix a couple of C compiler warnings

diff --git a/libvaladoc/gvc-compat.c b/libvaladoc/gvc-compat.c
index 9ec37e6164ce42fc3a0fc4c8e103ef74de1bfde5..962f74965eb040c0f8778164e5d94514641a62d9 100644 (file)
--- a/libvaladoc/gvc-compat.c
+++ b/libvaladoc/gvc-compat.c
@@ -25,7 +25,16 @@
 /* Compat-layer for Graphviz with/without cgraph support */
 
 void
-valadoc_compat_gvc_init ()
+valadoc_compat_gvc_init (void);
+
+Agnode_t*
+valadoc_compat_gvc_graph_create_node (Agraph_t* graph, const char *name);
+
+Agraph_t*
+valadoc_compat_gvc_graph_new (const char *name);
+
+void
+valadoc_compat_gvc_init (void)
 {
 #ifndef WITH_CGRAPH
        aginit ();