Allow disabling logs by redefining ggprintf macro

[petrdvorak]

Currently, the code in ggwave.cpp is always logging. Sometimes (especially in production builds), this could be undesired. It would be nice to disable logging, i.e., based on additional environment variable or in case DEBUG is not defined.

[ggerganov]

You can disable ggwave logging by calling the ggwave_setLogFile() function. Here is an example how to use it:

ggerganov/ggwave-objc@f64bae2

[petrdvorak]

Thank you, I will have a look. The issue of this approach, though, is that logging is configured at runtime. With macro definition, the logging code is rmeoved at compile time.