Index: potx.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/potx/Attic/potx.inc,v
retrieving revision 1.1.2.17.2.7.2.19.2.16
diff -U 3 -r1.1.2.17.2.7.2.19.2.16 potx.inc
--- potx.inc	26 Jan 2011 12:16:06 -0000	1.1.2.17.2.7.2.19.2.16
+++ potx.inc	5 Feb 2011 17:58:11 -0000
@@ -377,6 +377,7 @@
       else {
         // Maintain a list of unique file names.
         $_potx_store[$file_name]['sources']  = array_unique(array_merge($_potx_store[$file_name]['sources'], $file_list));
+        $_potx_store[$file_name] += array('strings' => '', 'count' => 0);
         $_potx_store[$file_name]['strings'] .= $output;
         $_potx_store[$file_name]['count']   += 1;
       }