'assign_new_user_avatar' exception when passing url as $url_or_media_id with php 8

[lllopo]

Describe the bug

When the assign_new_user_avatar function is called with first parameter ($url_or_media_id) being an url string and not a numeric media id, the function throws and exception on line 959 when running under PHP 8 :

Uncaught TypeError: Unsupported operand types: string + int in /SomePath/simple-local-avatars/includes/class-simple-local-avatars.php:959
Stack trace:
#0 /SomePath/SimpleLocalAvatarPlugin.php(56): Simple_Local_Avatars->assign_new_user_avatar('...', 56)
...

Steps to Reproduce

1. Call programmatically the assign_new_user_avatar like this :

global $simple_local_avatars;

if ( isset( $simple_local_avatars ) ) {
	$current_user = wp_get_current_user();
	$simple_local_avatars->assign_new_user_avatar( 'some_url_string', $current_user->ID );
}

Screenshots, screen recording, code snippet

No response

Environment information

No response

WordPress information

Wordpress 6.1.1
PHP 8.0.15
SimpleLocalAvatars 2.7.1

Code of Conduct

• I agree to follow this project's Code of Conduct

[faisal-alvi]

Note: This is coming from the fix #71