From: erg <devnull@localhost>
Date: Mon, 1 Nov 2010 18:49:35 +0000 (+0000)
Subject: Fix bug 2039
X-Git-Tag: LAST_LIBGRAPH~32^2~1155
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=38896f3899e9ea2bdeb9bd73ce990baaf25031ed;p=graphviz

Fix bug 2039
---

diff --git a/lib/neatogen/quad_prog_vpsc.c b/lib/neatogen/quad_prog_vpsc.c
index 2609d28d3..cfe11ce1b 100644
--- a/lib/neatogen/quad_prog_vpsc.c
+++ b/lib/neatogen/quad_prog_vpsc.c
@@ -113,7 +113,10 @@ constrained_majorization_vpsc(CMajEnvVPSC * e, float *b, float *place,
 	    }
 	    denominator -= r * g[i];
 	}
-	alpha = numerator / denominator;
+	if (denominator != 0)
+	    alpha = numerator / denominator;
+	else
+	    alpha = 1.0;
 	for (i = 0; i < n; i++) {
 	    place[i] -= alpha * g[i];
 	}