bug fix.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@5568 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/Functions.java

@@ -460,9 +460,7 @@ public class Functions {
                     result.add(b);
             } else {
                 // old plugins built before 1.150 may not implement BuildStepDescriptor
-                if(project instanceof Project) {
-                    result.add(b);
-                }
+                result.add(b);
             }
         }
         return result;