check before reading the configuration.

this fails when myplc installation doesn't have sfa installed.

diff --git a/PlanetLabConf/sfa_config.php b/PlanetLabConf/sfa_config.php
index 851128e..fee3dde 100755 (executable)
--- a/PlanetLabConf/sfa_config.php
+++ b/PlanetLabConf/sfa_config.php
@@ -8,7 +8,9 @@
 $config_directory = "/etc/sfa/";
 $default_name = "sfa_component_config";
 $file_name = $config_directory . $default_name;
-readfile($file_name); 
+if (file_exists($filename)) {
+    readfile($file_name); 
+}
 exit();
 
 ?>