Instead of saying that scaling up images will result in fuzzy images, just say that it's not supported (because it isn't).

fixes #23713. props ericlewis.

git-svn-id: http://core.svn.wordpress.org/trunk@24562 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/image-edit.php

@@ -82,7 +82,7 @@ function wp_image_editor($post_id, $msg = false) {
 	<div class="imgedit-group-top">
 		<a class="imgedit-help-toggle" onclick="imageEdit.toggleHelp(this);return false;" href="#"><strong><?php _e('Scale Image'); ?></strong></a>
 		<div class="imgedit-help">
-		<p><?php _e('You can proportionally scale the original image. For best results the scaling should be done before performing any other operations on it like crop, rotate, etc. Note that if you make the image larger it may become fuzzy.'); ?></p>
+		<p><?php _e('You can proportionally scale the original image. For best results the scaling should be done before performing any other operations on it like crop, rotate, etc. Note that images can only be scaled down, not up.'); ?></p>
 		<?php if ( isset( $meta['width'], $meta['height'] ) ): ?>
 		<p><?php printf( __('Original dimensions %s'), $meta['width'] . '&times;' . $meta['height'] ); ?></p>
 		<?php endif ?>