init global memory cache arrays

Update to 'add function result caching for cleanID and wikiFN'.
Makes certain that arrays exist for the caches, without checking on each function call.
Properly create multidimensional arrays in wikiFN().

darcs-hash:20060828071205-05dcb-7c8dbdb5ea4e7b73808ec3bd9222df1b837d3a1f.gz

inc/init.php

@@ -23,6 +23,10 @@
   if (!defined('DOKU_E_LEVEL')) { error_reporting(E_ALL ^ E_NOTICE); }
   else { error_reporting(DOKU_E_LEVEL); }
 
+  // init memory caches
+  $cache_wikifn = array();
+  $cache_cleanid = array();
+
   //prepare config array()
   global $conf;
   if (!defined('DOKU_UNITTEST')) {

inc/pageutils.php

@@ -188,6 +188,7 @@ function wikiFN($raw_id,$rev='',$clean=true){
     }
   }
 
+  if (!isset($cache[$raw_id])) { $cache[$raw_id] = array(); }
   $cache[$raw_id][$rev] = $fn;
   return $fn;
 }