[PATCH 7/7] wpa_supplicant: fix null dereference in ieee802_1x_get_mib_sta()

[Holger Schurig]

Hmm, isn't it allowed to pass NULL to the %s format specifier of
printf/snprintf and friends?  Or is it a GCC feature that it prints
the string "(null)" then?  That is perfectly "valgrind-clean".