Fix inclusive vs. exclusive error in binary search.

Fixes #554

diff --git a/extras/synchronizer.js b/extras/synchronizer.js
index f39209b..cbe26d2 100644 (file)
--- a/extras/synchronizer.js
+++ b/extras/synchronizer.js
@@ -200,7 +200,7 @@ function dygraphsBinarySearch(g, xVal) {
   var low = 0,
       high = g.numRows() - 1;
 
-  while (low < high) {
+  while (low <= high) {
     var idx = (high + low) >> 1;
     var x = g.getValue(idx, 0);
     if (x < xVal) {