[BUGFIX] Fix error due to null IP address

In the command-line context, the IP address from the referrer
will be null. Replace by empty string to avoid DB-writing
error.

Author: Francois Suter

ChangeLog

@@ -1,6 +1,7 @@
 2016-11-15 Francois Suter <[email protected]>
 
 	* Improved escaping of HTML content in log entries, resolves #2
+	* Fixed error due to possibly null IP address (CLI context)
 
 2016-11-13 Francois Suter <[email protected]>
 

Classes/Utility/Logger.php

@@ -99,7 +99,11 @@ public function log($logData)
             return;
         }
         // Add IP address for validation
-        $logData['ip'] = GeneralUtility::getIndpEnv('REMOTE_ADDR');
+        $ipAddress = GeneralUtility::getIndpEnv('REMOTE_ADDR');
+        if ($ipAddress === null) {
+            $ipAddress = '';
+        }
+        $logData['ip'] = $ipAddress;
         // If the log entry doesn't pass the basic filters, exit early doing nothing
         if (!$this->isEntryAccepted($logData)) {
             return;