From: Tobias Oetiker <tobi@oetiker.ch>
Date: Sat, 10 Nov 2012 16:48:16 +0000 (+0100)
Subject: fix trendnan variable access
X-Git-Tag: v1.5.0-rc1~207
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d2bd81b2dada49475f05762fdc9b06c030552d8f;p=thirdparty%2Frrdtool-1.x.git

fix trendnan variable access
---

diff --git a/src/rrd_rpncalc.c b/src/rrd_rpncalc.c
index ab01c8ad..1e76ee5d 100644
--- a/src/rrd_rpncalc.c
+++ b/src/rrd_rpncalc.c
@@ -887,7 +887,9 @@ short rpn_calc(
                 if (output_idx + 1 >= (int) ceil((float) dur / (float) step)) {
                     int       ignorenan = (rpnp[rpi].op == OP_TREND);
                     double    accum = 0.0;
-                    int       i = 0;
+                    int       i = -1; /* pick the current entries, not the next one
+                                         as the data pointer has already been forwarded
+                                         when the OP_VARIABLE was processed */
                     int       count = 0;
 
                     do {