x86-64 compile fixes and cleanups

Makefile

apps/app_festival.c

apps/app_milliwatt.c

apps/app_sms.c

apps/app_voicemail.c

asterisk.c

cdr/cdr_csv.c

channels/chan_iax2.c

channels/chan_sip.c

channels/chan_zap.c

channels/iax2-parser.c

codecs/gsm/Makefile

codecs/ilbc/Makefile

pbx.c

pbx/pbx_wilcalu.c

res/res_crypto.c

res/res_musiconhold.c