Set the `$comment` global in `comment_form_title()`.

In [33963], `comment_form_title()` was refactored so that it no longer made
reference to the `$comment` global. This broke some functionality within the
comment form, as certain template would no longer be able to access the
"current" comment.

Props d4z_c0nf, WisdmLabs, boonebgorges.
Fixes #35624.
Built from https://develop.svn.wordpress.org/trunk@36512


git-svn-id: http://core.svn.wordpress.org/trunk@36479 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment-template.php

@@ -1817,7 +1817,7 @@ function comment_id_fields( $id = 0 ) {
  *                             to their comment. Default true.
  */
 function comment_form_title( $noreplytext = false, $replytext = false, $linktoparent = true ) {
-	$comment = get_comment();
+	global $comment;
 
 	if ( false === $noreplytext ) $noreplytext = __( 'Leave a Reply' );
 	if ( false === $replytext ) $replytext = __( 'Leave a Reply to %s' );
@@ -1827,6 +1827,7 @@ function comment_form_title( $noreplytext = false, $replytext = false, $linktopa
 	if ( 0 == $replytoid )
 		echo $noreplytext;
 	else {
+		// Sets the global so that template tags can be used in the comment form.
 		$comment = get_comment($replytoid);
 		$author = ( $linktoparent ) ? '<a href="#comment-' . get_comment_ID() . '">' . get_comment_author( $comment ) . '</a>' : get_comment_author( $comment );
 		printf( $replytext, $author );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36511';
+$wp_version = '4.5-alpha-36512';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.