fix possible npe in symbole search for non project context Haehnchen#268

Author: Haehnchen

src/fr/adrienbrault/idea/symfony2plugin/Symfony2ProjectComponent.java

@@ -189,8 +189,8 @@ private void checkProject() {
 
  }
 
- public static boolean isEnabled(Project project) {
- return Settings.getInstance(project).pluginEnabled;
+ public static boolean isEnabled(@Nullable Project project) {
+ return project != null && Settings.getInstance(project).pluginEnabled;
  }
 
  /**