From: Emden Gansner <emdenrg@google.com>
Date: Mon, 5 Oct 2015 14:46:37 +0000 (-0400)
Subject: Prevent warning message.
X-Git-Tag: TRAVIS_CI_BUILD_EXPERIMENTAL~103
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=44394e0d0448f2c4663ad4e9843648123a5b2a2b;p=graphviz

Prevent warning message.
---

diff --git a/cmd/gvpr/lib/binduce b/cmd/gvpr/lib/binduce
index 9e987c33e..a19fceba1 100644
--- a/cmd/gvpr/lib/binduce
+++ b/cmd/gvpr/lib/binduce
@@ -23,7 +23,7 @@ N[aget($,aname)==value] {
     for (e = fstedge($); e; e = nxtedge(e, $))
       nbrs[cnt++] = opp(e,$);
     for (i = 0; i < cnt-1; i++) {
-      if (e = isEdge(nbrs[i],nbrs[i+1],"")) {
+      if ((e = isEdge(nbrs[i],nbrs[i+1],"")) != NULL) {
         wt[e] += 1;
       }
       else if ($G.directed && (e = isEdge(nbrs[i+1],nbrs[i],""))) {