init: fix integer as NULL pointer warnings

init/do_mounts_rd.c:215:13: warning: Using plain integer as NULL pointer
init/do_mounts_md.c:136:45: warning: Using plain integer as NULL pointer

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

init/do_mounts_md.c

@@ -133,7 +133,7 @@ static void __init md_setup_drive(void)
 		else
 			dev = MKDEV(MD_MAJOR, minor);
 		create_dev(name, dev);
-		for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
+		for (i = 0; i < MD_SB_DISKS && devname != NULL; i++) {
 			char *p;
 			char comp_name[64];
 			u32 rdev;

init/do_mounts_rd.c

@@ -212,7 +212,7 @@ int __init rd_load_image(char *from)
 	}
 
 	buf = kmalloc(BLOCK_SIZE, GFP_KERNEL);
-	if (buf == 0) {
+	if (!buf) {
 		printk(KERN_ERR "RAMDISK: could not allocate buffer\n");
 		goto done;
 	}