backport from 1.4 round the index of the PERCENT selected element

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.3@1896 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/program/src/rrd_graph.c b/program/src/rrd_graph.c
index 1ccbdf87951b059c0009e9b67de0b4c8b79acb51..1505d5f780456277c0473e2cd037ce618f23c1a4 100644 (file)
--- a/program/src/rrd_graph.c
+++ b/program/src/rrd_graph.c
@@ -4624,7 +4624,7 @@ int vdef_calc(
             array[step] = data[step * src->ds_cnt];
         }
         qsort(array, step, sizeof(double), vdef_percent_compar);
-        field = (steps - 1) * dst->vf.param / 100;
+        field = round((dst->vf.param * (double)(steps - 1)) / 100.0);
         dst->vf.val = array[field];
         dst->vf.when = 0;   /* no time component */
         free(array);
@@ -4633,7 +4633,7 @@ int vdef_calc(
             printf("DEBUG: %3li:%10.2f %c\n",
                    step, array[step], step == field ? '*' : ' ');
 #endif
-    }
+        }
         break;
     case VDEF_MAXIMUM:
         step = 0;