fix magpie w3cdtf parsing (closes #110)

magpierss/rss_utils.inc

@@ -29,13 +29,13 @@ function parse_w3cdtf ( $date_str ) {
     
     if ( preg_match( $pat, $date_str, $match ) ) {
         list( $year, $month, $day, $hours, $minutes, $seconds) = 
-            array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[6]);
+            array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]);
         
         # calc epoch for current date assuming GMT
         $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year);
         
         $offset = 0;
-        if ( $match[10] == 'Z' ) {
+        if ( $match[11] == 'Z' ) {
             # zulu time, aka GMT
         }
         else {