From 9e5e7572b2d2467a4417452869702e2e908267db Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Fri, 31 Jan 2003 06:46:32 +0000
Subject: [PATCH] The NaN check should only use lastgdes when following a STACK
 -- Scott Mace <smace@intt.ORG>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@176 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 src/rrd_graph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 9e9cd8f..e1160f2 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -2399,7 +2399,7 @@ graph_paint(image_desc_t *im, char ***calcpr)
       /* make sure we do not run into trouble when stacking on NaN */
       for(ii=0;ii<im->xsize;ii++){
         if (isnan(im->gdes[i].p_data[ii])) {
-          if (lastgdes) {
+          if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
             im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
           } else {
             im->gdes[i].p_data[ii] =  ytr(im,areazero);
-- 
2.11.0