when moving the data pointers we should take into account how fahr off they

are. Found by David M. Grimes <dgrimes@navisite.com>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk@287 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/program/src/rrd_graph.c b/program/src/rrd_graph.c
index 9597daff9479605049669bfeec859135715f7e40..6d9195490c8c8bef2796e23eb16c59504d6e147d 100644 (file)
--- a/program/src/rrd_graph.c
+++ b/program/src/rrd_graph.c
@@ -913,7 +913,8 @@ data_calc( image_desc_t *im){
                   im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
                         long ptr = im->gdes[gdi].rpnp[rpi].ptr;
                         if(im->gdes[gdi].start > im->gdes[ptr].start) {
-                            im->gdes[gdi].rpnp[rpi].data += im->gdes[gdi].rpnp[rpi].ds_cnt;
+                            im->gdes[gdi].rpnp[rpi].data += im->gdes[gdi].rpnp[rpi].ds_cnt
+                               * ((im->gdes[gdi].start - im->gdes[ptr].start) / im->gdes[ptr].step);
                         }
                      }
                 }