fixed NP_NULL_ON_SOME_PATH findbugs error

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/digester/trunk@1142280 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/digester3/CallMethodRule.java b/src/main/java/org/apache/commons/digester3/CallMethodRule.java
index b77ab20..92bac87 100644
--- a/src/main/java/org/apache/commons/digester3/CallMethodRule.java
+++ b/src/main/java/org/apache/commons/digester3/CallMethodRule.java
@@ -435,6 +435,7 @@
             // means that we truly are calling a method with no parameters.
             // Nothing special needs to be done here.
             parameters = new Object[0];
+            paramTypes = new Class<?>[0];
         }
 
         // Construct the parameter values array we will need