fixes for #62: eliminate unused parameter warnings

core/include/mutex.h

core/mutex.c

cpu/msp430-common/hwtimer_cpu.c

cpu/native/hwtimer_cpu.c

cpu/native/irq_cpu.c

drivers/cc110x/cc1100_phy.c

drivers/sht11/sht11.c

sys/logd/logd.c

sys/net/destiny/socket.c

sys/net/destiny/tcp.c

sys/net/destiny/tcp_timer.c

sys/net/sixlowpan/bordermultiplex.c

sys/net/sixlowpan/rpl/etx_beaconing.c

sys/net/sixlowpan/rpl/rpl.c

sys/net/sixlowpan/semaphore.c

sys/net/sixlowpan/sixlowmac.c

sys/net/sixlowpan/sixlownd.c

sys/net/sixlowpan/sixlowpan.c

sys/vtimer/vtimer.c