Just initialize config=, no arg passed in yet

Change-Id: Ib3861746b416d2f028b7956945fbeffde4dbfc7e
diff --git a/vars/getPodsInfo.groovy b/vars/getPodsInfo.groovy
index ecd785c..01a1dfc 100644
--- a/vars/getPodsInfo.groovy
+++ b/vars/getPodsInfo.groovy
@@ -85,7 +85,7 @@
 // def call(Map config=[:])
 def call(String dest)
 {
-    Map config ?: [:]
+    Map config = [:] // Map config = config ?: [:]
 
     try
     {