Use NULL instead of 0 for pointers.
authoraraujo <araujo@FreeBSD.org>
Tue, 19 Apr 2016 02:05:32 +0000 (02:05 +0000)
committeraraujo <araujo@FreeBSD.org>
Tue, 19 Apr 2016 02:05:32 +0000 (02:05 +0000)
commit30f25483feeac1aec4367d90eb824f7fd324ea51
treefcb8438ef56efce4f62795f6fe26816675cd8555
parenteccc897bf6bf6438652c5d5fa63f980e3d5140d6
Use NULL instead of 0 for pointers.

realloc will return NULL in case it cannot allocate memory.

MFC after: 2 weeks.
usr.bin/lex/initparse.c
usr.bin/lex/initscan.c