Refactor: Get $api_key just before it is used

It was moved out of place in 72efe22b.

fillpdf.module

@@ -1216,8 +1216,6 @@ function fillpdf_execute_merge($method, $fields, $fillpdf, $mode = 'url', $flatt
   switch ($method) {
     // FillPDF Service.
     case 'remote':
-      $api_key = variable_get('fillpdf_api_key', '0');
-
       // Anonymize image data from the fields array; we should not send the real
       // filename to FillPDF Service. We do this in the specific fill method
       // because others (e.g. local) may need the filename on the local system.
@@ -1229,6 +1227,7 @@ function fillpdf_execute_merge($method, $fields, $fillpdf, $mode = 'url', $flatt
       }
       unset($field);
 
+      $api_key = variable_get('fillpdf_api_key', '0');
       $result = _fillpdf_xmlrpc_request(FILLPDF_DEFAULT_SERVLET_URL, 'merge_pdf_v3', base64_encode($contents), $fields, $api_key, $flatten, $image_data);
       if ($result->error == TRUE) {
         drupal_goto();