don't ignore first line of buffer file now it no longer has the php exit line

Author: dannyvankooten

src/class-aggregator.php

@@ -54,9 +54,6 @@ public static function run(): void
             return;
         }
 
-        // read and ignore first line (the PHP header that prevents direct file access)
-        \fgets($file_handle);
-
         while (($line = \fgets($file_handle)) !== false) {
             $line = \trim($line);
             if ($line === '' || $line === '<?php exit; ?>') {
@@ -66,6 +63,7 @@ public static function run(): void
             $params = \unserialize($line, ['allowed_classes' => false]);
             if (! \is_array($params)) {
                 error_log('Koko Analytics: unserialize error encountered while processing line in buffer file');
+                continue;
             }
             $type   = \array_shift($params);