logger : remove a Strict Standard warning

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@1957 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

logger.php

@@ -18,7 +18,7 @@ class logger
   // TODO : Add SQL support
   /** The method to log.
       Can be display, file, syslog
-      Can be merged with a pipe : "display|syslog"*/
+      Can be merged with a pipe : "display|syslog|file"*/
   public $logtype = "display";
   /** For logtype=file, the filename to use */
   public $logfile = FALSE;
@@ -57,7 +57,8 @@ class logger
   {
     if ($this->loglevelmin < $priority)
       return;
-    $back = reset (debug_backtrace());
+    $backtrace = debug_backtrace();
+    $back = reset ($backtrace);
     $message .= " [".basename ($back["file"]).":".$back["line"]."]";
     $logsType = explode ("|", $this->logtype);
     if (in_array ("display", $logsType))
@@ -84,8 +85,7 @@ class logger
         throw new Exception ("The directory ".dirname ($this->logfile)." must"
                             ." be writable to create log file");
     }
-
-    if (!is_writable ($this->logfile))
+    elseif (!is_writable ($this->logfile))
     {
       if (function_exists ("posix_geteuid"))
         $user = posix_geteuid ();