makes sure that split works only on elements

Author: adamwulf

samples/index.html

@@ -24,3 +24,4 @@ <h3>About</h3>
 <p><b>GitHub Issues</b></p>
 <p><a href='issue_51.html'>Issues 51, 24</a> - missing content when columnizer is called from script in body below content.</p>
 <p><a href='issue_45.html'>Issue 45</a> - don't re-indent the first line of a split paragraph.</p>
+<p><a href='issue_49.html'>Issue 49</a> - make sure columnizer doesn't duplicate text nodes.</p>

src/jquery.columnizer.js

@@ -185,8 +185,12 @@
 		 * two copies of the element with it's contents divided between each
 		 */
 		function split($putInHere, $pullOutHere, $parentColumn, targetHeight){
-			if($pullOutHere.children().length){
-				var $cloneMe = $pullOutHere.children(":first");
+			if($pullOutHere.contents().length){
+				var $cloneMe = $pullOutHere.contents(":first");
+				//
+				// make sure we're splitting an element
+				if($cloneMe.get(0).nodeType != 1) return;
+				
 				//
 				// clone the node with all data and events
 				var $clone = $cloneMe.clone(true);