add error suppression to iswin check to avoid notices when DOKU_UNITTEST_ASSUME_WINDOWS isn't set

darcs-hash:20090122081649-f07c6-e7744b1496e1a05ab089812fd7ca3716ecec2290.gz

inc/init.php

@@ -510,7 +510,7 @@ EOT;
 function fullpath($path,$exists=false){
     static $run = 0; 
     $root  = '';
-    $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || $GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS']);
+    $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || @$GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS']);
 
     // find the (indestructable) root of the path - keeps windows stuff intact
     if($path{0} == '/'){