Ensure the editor height is saved properly as an integer.

Merges [28193] to the 3.9 branch.

props jupiterwise.
fixes #28000.

Built from https://develop.svn.wordpress.org/branches/3.9@28200


git-svn-id: http://core.svn.wordpress.org/branches/3.9@28030 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/post.js

@@ -1025,7 +1025,7 @@ jQuery(document).ready( function($) {
 
 			if ( mce ) {
 				editor.focus();
-				toolbarHeight = $( '#wp-content-editor-container .mce-toolbar-grp' ).height();
+				toolbarHeight = parseInt( $( '#wp-content-editor-container .mce-toolbar-grp' ).height(), 10 );
 
 				if ( toolbarHeight < 10 || toolbarHeight > 200 ) {
 					toolbarHeight = 30;