[feature/avatars] Pass phpbb_user object to get_custom_html()

Pass the phpbb_user object to function get_custom_html(). This object is
used in that method. Also fixed incorrect arguments to get_custom_html()
in phpbb_get_avatar().

PHPBB3-10018

phpBB/includes/avatar/driver/driver.php

@@ -71,7 +71,7 @@ abstract class phpbb_avatar_driver implements phpbb_avatar_driver_interface
 	/**
 	* @inheritdoc
 	*/
-	public function get_custom_html($row, $alt = '')
+	public function get_custom_html($user, $row, $alt = '')
 	{
 		return '';
 	}

phpBB/includes/avatar/driver/gravatar.php

@@ -41,7 +41,7 @@ class phpbb_avatar_driver_gravatar extends phpbb_avatar_driver
 	/**
 	* @inheritdoc
 	*/
-	public function get_custom_html($row, $alt = '')
+	public function get_custom_html($user, $row, $alt = '')
 	{
 		return '<img src="' . $this->get_gravatar_url($row) . '" ' .
 			($row['avatar_width'] ? ('width="' . $row['avatar_width'] . '" ') : '') .

phpBB/includes/avatar/driver/interface.php

@@ -41,11 +41,14 @@ interface phpbb_avatar_driver_interface
 	/**
 	* Returns custom html if it is needed for displaying this avatar
 	*
+	* @param phpbb_user $user phpBB user object
+	* @param array	$row User data or group data that has been cleaned with 
+	*        phpbb_avatar_manager::clean_row
 	* @param string $alt Alternate text for avatar image
 	*
 	* @return string HTML
 	*/
-	public function get_custom_html($row, $alt = '');
+	public function get_custom_html($user, $row, $alt = '');
 
 	/**
 	* Prepare form for changing the settings of this avatar

phpBB/includes/functions_display.php

@@ -1400,7 +1400,7 @@ function phpbb_get_avatar($row, $alt, $ignore_config = false)
 
 	if ($driver)
 	{
-		$html = $driver->get_custom_html($row, $ignore_config, $alt);
+		$html = $driver->get_custom_html($user, $row, $alt);
 		if (!empty($html))
 		{
 			return $html;