[UNDERTOW-2604] fix potential NPE from alternate ctor

Signed-off-by: Flavia Rainone <frainone@redhat.com>

Author: bjlaub

core/src/main/java/io/undertow/conduits/InflatingStreamSourceConduit.java

@@ -73,10 +73,7 @@ public InflatingStreamSourceConduit(
             HttpServerExchange exchange,
             StreamSourceConduit next,
             ObjectPool<Inflater> inflaterPool) {
-        super(next);
-        this.exchange = exchange;
-        this.objectPoolNonWrapping = inflaterPool;
-        this.objectPoolWrapping = null;
+        this(exchange, next, inflaterPool, newInstanceWrappingInflaterPool());
     }
 
     public InflatingStreamSourceConduit(