Avoid Findbugs dead local store warning

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/net/trunk@1741765 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/net/nntp/Threader.java b/src/main/java/org/apache/commons/net/nntp/Threader.java
index 75dacba..d638594 100644
--- a/src/main/java/org/apache/commons/net/nntp/Threader.java
+++ b/src/main/java/org/apache/commons/net/nntp/Threader.java
@@ -109,7 +109,8 @@
         // be a duplicate id, in which case we will need to generate a bogus placeholder id
         if (container != null) {
             if (container.threadable != null) { // oops! duplicate ids...
-                id = "<Bogus-id:" + (bogusIdCount++) + ">";
+                bogusIdCount++ ; // Avoid dead local store warning
+                id = "<Bogus-id:" + (bogusIdCount) + ">";
                 container = null;
             } else {
                 // The container just contained a forward reference to this message, so let's