Removing correctely the debug file (only if it exists)

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@1488 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

markdown.php

@@ -16,7 +16,8 @@ class markdown
       @param string $mark Message in markdown syntax to display */
   public function html ($mark)
   {
-    if ($this->debug) unlink ("/tmp/debug");
+    if ($this->debug && file_exists ("/tmp/debugMD"))
+      unlink ("/tmp/debugMD");
     $res = "";
     $mark = htmlentities ($mark, ENT_QUOTES);