From 0ca599ff52d53c4cda57ab75bf637176454b5b51 Mon Sep 17 00:00:00 2001
From: "Emden R. Gansner" <erg@alum.mit.edu>
Date: Tue, 25 Mar 2014 09:57:21 -0400
Subject: [PATCH] Make sure dot_root() works for all graph objects.

---
 lib/dotgen/dotinit.c  | 4 ++--
 lib/dotgen/dotprocs.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/dotgen/dotinit.c b/lib/dotgen/dotinit.c
index fe41c52e1..de1aaa254 100644
--- a/lib/dotgen/dotinit.c
+++ b/lib/dotgen/dotinit.c
@@ -437,8 +437,8 @@ void dot_layout(Agraph_t * g)
     dotneato_postprocess(g);
 }
 
-Agraph_t * dot_root (Agraph_t* g)
+Agraph_t * dot_root (void* p)
 {
-    return GD_dotroot(g);
+    return GD_dotroot(agroot(p));
 }
 
diff --git a/lib/dotgen/dotprocs.h b/lib/dotgen/dotprocs.h
index 9c8ebf597..a0470afd4 100644
--- a/lib/dotgen/dotprocs.h
+++ b/lib/dotgen/dotprocs.h
@@ -77,7 +77,7 @@ extern "C" {
 #if defined(_BLD_dot) && defined(_DLL)
 #   define extern __EXPORT__
 #endif
-    extern Agraph_t* dot_root(Agraph_t *);
+    extern Agraph_t* dot_root(void *);
     extern void dot_concentrate(Agraph_t *);
     extern void dot_mincross(Agraph_t *, int);
     extern void dot_position(Agraph_t *, aspect_t*);
-- 
2.40.0