IA64: avoid -Wunused-but-set-variable in src/ia64/init.h

In file included from src/ia64/Ginit_remote.c:26:0:
src/ia64/init.h: In function 'common_init':
src/ia64/init.h:32:12: warning: variable 'natp' set but not used [-Wunused-but-set-variable]
1 file changed