NULL              100 ext/sdbm/_sdbm.c #define NULL	0
NULL               43 ext/syck/syck.h # define NULL (void *)0
NULL               53 missing/alloca.c #define	NULL	0			/* null pointer constant */
NULL              123 missing/vsnprintf.c #define	NULL	0
NULL               49 regenc.h       #define NULL   ((void* )0)