correction from compile warning
correction from compile warning

Just correction from compile warnings:

src/ext-fwd.c: In function \u2018fwd_debug\u2019:
src/ext-fwd.c:84:2: warning: format \u2018%d\u2019 expects argument of type \u2018int\u2019, but argument 3 has type \u2018size_t\u2019 [-Wformat=]
  dprintf( fd, " Found %d forwardings.\n", counter );
  ^
mwarning/KadNode,mwarning/KadNode,mwarning/KadNode