Empty FormatArg() constructor doesn't initialize members

[krlmlr]

https://github.com/c42f/tinyformat/blob/46a6d778e7abafa057efc546197603d32719bfc5/tinyformat.h#L490

This confuses Coverity, and also looks unsafe:

Reference: https://github.com/RcppCore/Rcpp/issues/760

[nigels-com]

Agreed. NULLing out the pointers would be correct.

[c42f]

Thanks Nigel for #43 - this should eliminate the warning (please feel free to reopen if you still have issues).

As a side note, I'm quite sure this was in fact a false alarm as other internal implementation details ensure these pointers are always initialized. However, it's always good to keep the warnings to a minimum.

[krlmlr]

Thanks. Agreed that the implementation may have been correct before, but it still feels safer to initialize.

[krlmlr]

Thanks. Agreed that the implementation may have been correct before, but it still feels safer to initialize.