THRIFT-4405: sanity tests relating to sequence numbers

- prove all servers return the sequence ID given
- prove that sequences that wrap around the int32_t space are handled ok
diff --git a/lib/cpp/src/thrift/TBase.h b/lib/cpp/src/thrift/TBase.h
index cc31c34..e2e78e7 100644
--- a/lib/cpp/src/thrift/TBase.h
+++ b/lib/cpp/src/thrift/TBase.h
@@ -28,7 +28,7 @@
 
 class TBase {
 public:
-  virtual ~TBase()= default;;
+  virtual ~TBase() = default;
   virtual uint32_t read(protocol::TProtocol* iprot) = 0;
   virtual uint32_t write(protocol::TProtocol* oprot) const = 0;
 };