- merge optimizitation of sql query (in section_init from trunk)

- stricter check of url in parse_section_url

git-svn-id: http://piwigo.org/svn/branches/branch-1_7@2301 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions_url.inc.php

@@ -524,7 +524,7 @@ function parse_section_url( $tokens, &$next_token)
       {
         array_push($requested_tag_ids, $matches[1]);
       }
-      else
+      elseif ( !empty($tokens[$i]) )
       {
         array_push($requested_tag_url_names, $tokens[$i]);
       }