Assume RLIMIT_FSIZE is defined

It is required by POSIX.1-2001.

Cc: Christian Göttsche <cgzones@googlemail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

libmisc/pwd_init.c

@@ -36,9 +36,7 @@ void pwd_init (void)
 
 	setrlimit (RLIMIT_CPU, &rlim);
 	setrlimit (RLIMIT_DATA, &rlim);
-#ifdef RLIMIT_FSIZE
 	setrlimit (RLIMIT_FSIZE, &rlim);
-#endif
 #ifdef RLIMIT_NOFILE
 	setrlimit (RLIMIT_NOFILE, &rlim);
 #endif