Unused variable in LogDispatchCallback

[tomkraw1]

Hi!

Easylogging++ v9.96.7

According to g++ 8.1.0 varable data is not used:

..\src\easylogging++.cc: In member function 'virtual void el::LogDispatchCallback::handle(const el::LogDispatchData*)':
..\src\easylogging++.cc:2187:57: warning: unused parameter 'data' [-Wunused-parameter]
 void LogDispatchCallback::handle(const LogDispatchData* data) {
                                  ~~~~~~~~~~~~~~~~~~~~~~~^~~~

Thanks for your work! The logger is reat!

regards tomkraw1