kbd: Use NULL instead of 0 for pointers

[Alexandr Shadchin]

Use NULL instead of 0 for pointers

-- 
Alexandr Shadchin

Index: kbd_wscons.c
===================================================================
RCS file: /cvs/src/sbin/kbd/kbd_wscons.c,v
retrieving revision 1.25
diff -u -p -r1.25 kbd_wscons.c
--- kbd_wscons.c        23 Jun 2008 17:41:21 -0000      1.25
+++ kbd_wscons.c        13 Jul 2012 09:34:14 -0000
@@ -93,13 +93,13 @@ struct nameint {
 struct nameint kbdenc_tab[] = {
        KB_ENCTAB
        ,
-       { 0, 0 }
+       { 0, NULL }
 };
 
 struct nameint kbdvar_tab[] = {
        KB_VARTAB
        ,
-       { 0, 0 }
+       { 0, NULL }
 };
 
 extern char *__progname;
@@ -232,7 +232,7 @@ kbd_list(void)
        }
 
 #ifndef NOKVM
-       if ((kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf)) == 0)
+       if ((kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf)) == NULL)
                errx(1, "kvm_openfiles: %s", errbuf);
 
        if (kvm_nlist(kd, nl) == -1)