now correctly suppressing Undefined offset PHP Notices on non-standard mail headers

Author: onlime

app/StdinMailParser.php

@@ -108,7 +108,7 @@ public function getParsedHeaderArr()
         $headerLines = explode(PHP_EOL, $this->_header);
         $headerArr   = [];
         foreach ($headerLines as $line) {
-            list($key, $value) = @explode(":", $line);
+            @list($key, $value) = explode(":", $line);
             if (is_null($value)) {
                 // avoid 'PHP Notice:  Undefined offset: 1' on header line without colon
                 syslog(LOG_WARNING, sprintf('%s: Could not parse mail header line: %s', __METHOD__, $line));