TinyMCE: make sure the editor is not completely empty before checking if the user clicked above or below a wpView.

Fixes #31765.
Built from https://develop.svn.wordpress.org/trunk@31888


git-svn-id: http://core.svn.wordpress.org/trunk@31867 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/tinymce/plugins/wpview/plugin.js

@@ -219,10 +219,15 @@ tinymce.PluginManager.add( 'wpview', function( editor ) {
 			body = editor.getBody(),
 			bodyRect = body.getBoundingClientRect(),
 			first = body.firstChild,
-			firstRect = first.getBoundingClientRect(),
 			last = body.lastChild,
-			lastRect = last.getBoundingClientRect(),
-			view;
+			firstRect, lastRect, view;
+
+		if ( ! first || ! last ) {
+			return;
+		}
+
+		firstRect = first.getBoundingClientRect();
+		lastRect = last.getBoundingClientRect();
 
 		if ( y < firstRect.top && ( view = getView( first ) ) ) {
 			setViewCursor( true, view );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-beta2-31887';
+$wp_version = '4.2-beta2-31888';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.