TinyMCE Views in IE8 and 7: change deselect event only for old IE, props gcorne, fixes #27546

Built from https://develop.svn.wordpress.org/trunk@28063


git-svn-id: http://core.svn.wordpress.org/trunk@27895 1a063a9b-81f0-0310-95a4-ce76da25c4cd

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

@@ -293,7 +293,7 @@ tinymce.PluginManager.add( 'wpview', function( editor ) {
 
 				// Fix issue with deselecting a view in IE8. Without this hack, clicking content above the view wouldn't actually deselect it
 				// and the caret wouldn't be placed at the mouse location
-				if( tinymce.Env.ie <= 8 ) {
+				if ( tinymce.Env.ie && tinymce.Env.ie <= 8 ) {
 					deselectEventType = 'mouseup';
 				} else {
 					deselectEventType = 'mousedown';