CASSANDRA-16109: if user has not set nodeCount, use the node id topology size (#20)

diff --git a/src/main/java/org/apache/cassandra/distributed/shared/AbstractBuilder.java b/src/main/java/org/apache/cassandra/distributed/shared/AbstractBuilder.java
index 47f2d48..95e7e5d 100644
--- a/src/main/java/org/apache/cassandra/distributed/shared/AbstractBuilder.java
+++ b/src/main/java/org/apache/cassandra/distributed/shared/AbstractBuilder.java
@@ -292,7 +292,10 @@
             }
             else if (nodeIdTopology.size() > nodeCount)
             {
-                System.out.printf("nodeIdTopology configured for %d nodes while nodeCount is %d%n", nodeIdTopology.size(), nodeCount);
+                if (nodeCount == 0)
+                    nodeCount = nodeIdTopology.size();
+                else
+                    System.out.printf("nodeIdTopology configured for %d nodes while nodeCount is %d%n", nodeIdTopology.size(), nodeCount);
             }
         }
         else