Fixes regarding the new default profile photo size. The default profile photos are just renamed. People which provided the originals are invited to reproduce them in the new 300 by 300 px format.

include/network.php

@@ -531,7 +531,7 @@ function avatar_img($email) {
 	$avatar = array();
 	$a = get_app();
 
-	$avatar['size'] = 175;
+	$avatar['size'] = 300;
 	$avatar['email'] = $email;
 	$avatar['url'] = '';
 	$avatar['success'] = false;
@@ -1658,4 +1658,4 @@ function format_and_send_email($sender,$xchan,$item) {
 
 
 
-}
+}