libosmocore: gsm48_mi_to_string() TMSI parsing

Hello all!

I just quickly looked at the gsm48_mi_to_string() method in gsm48.c. I found that it is used in several projects like OsmocomBB and OpenBSC, but it seems a bit strange to me that the TMSI represented in decimal...

... uint32_t tmsi; ... return snprintf(string, str_len, "%u", tmsi); ...

Can we move to use a hex representation instead of decimal? And why if not?

... uint32_t tmsi; ... return snprintf(string, str_len, "%x", tmsi); ...

С наилучшими пожеланиями, Яницкий Вадим.