Fix hidden image map issue

issue #461
img.getClientRects() was returning an empty object instead of false
when the img map was not displayed. So instead of checking for a false
object, check for the length of items instead.

1 files changed, 1 insertions, 1 deletions

diff --git a/linkHints.js b/linkHints.js
index ce5b80ed..14747f16 100644
--- a/linkHints.js
+++ b/linkHints.js
@@ -132,7 +132,7 @@ var linkHints = {
         var img = document.querySelector("img[usemap='#" + map.getAttribute("name") + "']");
         if (!img) continue;
         var imgClientRects = img.getClientRects();
-        if (!imgClientRects) continue;
+        if (imgClientRects.length == 0) continue;
         var c = element.coords.split(/,/);
         var coords = [parseInt(c[0], 10), parseInt(c[1], 10), parseInt(c[2], 10), parseInt(c[3], 10)];
         var rect = {