Better checks for contributors when saving posts.

props dd32, kovshenin, plocha.
see #27452.


git-svn-id: https://develop.svn.wordpress.org/trunk@27964 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-posts-list-table.php

@@ -978,7 +978,7 @@ class WP_Posts_List_Table extends WP_List_Table {
 	<?php if ( !$bulk ) echo $authors_dropdown;
 	endif; // post_type_supports author
 
-	if ( !$bulk ) :
+	if ( !$bulk && $can_publish ) :
 	?>
 
 			<div class="inline-edit-group">