Running ./configure with --disable-lfs #define's NBD_LFS to 0 and
doesn't #undef it, so the LFS check should use #if rather than #ifdef
similar to how it is done in cliserv.h
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
#define LFS_H
#include "config.h"
-#ifdef NBD_LFS
+#if NBD_LFS
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE_SOURCE
#endif /* NBD_LFS */