fixed bug in detecting if we should use native scroll

Author: sjwilliams

index.html

@@ -283,10 +283,10 @@ <h1>LaziestLoader</h1>
     </section>
 
     <section class="installation">
-        <h2>Download v0.7.0</h2>
+        <h2>Download v0.7.1</h2>
         <ol>
-            <li><a href="https://raw.githubusercontent.com/sjwilliams/laziestloader/v0.7.0/jquery.laziestloader.js">Development Version</a></li>
-            <li><a href="https://raw.githubusercontent.com/sjwilliams/laziestloader/v0.7.0/jquery.laziestloader.min.js">Production Version</a></li>
+            <li><a href="https://raw.githubusercontent.com/sjwilliams/laziestloader/v0.7.1/jquery.laziestloader.js">Development Version</a></li>
+            <li><a href="https://raw.githubusercontent.com/sjwilliams/laziestloader/v0.7.1/jquery.laziestloader.min.js">Production Version</a></li>
             <li><span class="code">$ npm install laziestloader</span></li>
             <li><span class="code">$ bower install laziestloader</span></li>
         </ol>
@@ -622,6 +622,11 @@ <h2>Trigger</h2>
 
     <section id="releasehistory">
         <h2>Release History</h2>
+        <h4>0.7.1</h4>
+        <ul>
+            <li>Fixed bug in detecting if watched event should be native scroll.</li>
+        </ul>
+
         <h4>0.7.0</h4>
         <ul>
             <li>Allow custom events, beyond the native scroll event, to trigger LaziestLoader. See <a href="https://github.com/sjwilliams/laziestloader/pull/16">Issue 16</a>.</li>

jquery.laziestloader.js

@@ -1,5 +1,5 @@
 /**
- * @preserve LaziestLoader - v0.7.0 - 2015-11-17
+ * @preserve LaziestLoader - v0.7.1 - 2015-11-17
  * A responsive lazy loader for jQuery.
  * http://sjwilliams.github.io/laziestloader/
  * Copyright (c) 2015 Josh Williams; Licensed MIT
@@ -32,7 +32,9 @@
     }, options);
 
 
-    var useNativeScroll = options.event === 'string' && options.event.indexOf('scroll') === 0;
+    var useNativeScroll = (typeof options.event === 'string') && (options.event.indexOf('scroll') === 0);
+
+    console.log('use native scroll', useNativeScroll);
 
     /**
      * Generate source path of image to load. Take into account

jquery.laziestloader.min.js

@@ -1,6 +1,6 @@
 {
   "name": "laziestloader",
-  "version": "0.7.0",
+  "version": "0.7.1",
   "author": "Josh Williams <contact@joshwilliams.com>",
   "description": "A responsive-aware jQuery plugin to smartly lazy load images and trigger callbacks.",
   "repository": {