Fix course information retrieval

If some of the course information could not be retrieved from the
EvaSys system, do not abort the whole retrieval process but instead
skip the respective course and continue with the other courses.

This is especially problematic for Moodle courses which are connected
with several EvaSys courses. Without this patch the block displays
"course missing" for all of the connected courses even if only one of
the courses does not exist in EvaSys.

Author: dlmsr

classes/evasys_synchronizer.php

@@ -74,13 +74,15 @@ private function get_course_information() {
         foreach ($this->get_allocated_courses() as $course) {
             $soapresult = $this->soapclient->GetCourse($course, 'PUBLIC', true, true);
             if (is_soap_fault($soapresult)) {
-                // var_dump("soap verbindung nicht funktioniert");
-                // This happens e.g. if there is no corresponding course in EvaSys.
-                return null;
+                // This happens e.g. if there is no corresponding course in
+                // EvaSys.
+                $result[$course] = null;
+            } else {
+                $result[$course] = $soapresult;
             }
-	    $result[$course] = $soapresult;
+
         }
-	return $result;
+        return $result;
     }
 
     /**