avoid a leak with previous patch Daniel

* parserInternals.c: avoid a leak with previous patch
Daniel
diff --git a/parserInternals.c b/parserInternals.c
index 5332eed..02071b7 100644
--- a/parserInternals.c
+++ b/parserInternals.c
@@ -2168,6 +2168,7 @@
     }
 
     inputStream->filename = (char *) xmlCanonicPath((const xmlChar *) URI);
+    if (URI != NULL) xmlFree((char *) URI);
     inputStream->directory = directory;
     inputStream->buf = buf;