u8vector->string had been rewritten in same fashion as string->u8vector
treee1befc7ded77f4caf6e1034d7b47c592ced715da
-rw-r--r-- 797 common.scm
-rw-r--r-- 3385 iface_type.c
-rw-r--r-- 363 iface_type.h
-rw-r--r-- 2587 libusb.c
-rw-r--r-- 422 main.c