fs/qnx4: decrement sizeof size in strncmp

As an identical match is wanted in this case, strcmp can be used instead.

The semantic match that lead to detecting this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression foo;
constant char *abc;
@@

*strncmp(foo, abc, sizeof(abc))
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NAnders Larsen <al@alarsen.net>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

fs/qnx4/inode.c

@@ -201,7 +201,8 @@ static const char *qnx4_checkroot(struct super_block *sb)
 				rootdir = (struct qnx4_inode_entry *) (bh->b_data + i * QNX4_DIR_ENTRY_SIZE);
 				if (rootdir->di_fname != NULL) {
 					QNX4DEBUG((KERN_INFO "rootdir entry found : [%s]\n", rootdir->di_fname));
-					if (!strncmp(rootdir->di_fname, QNX4_BMNAME, sizeof QNX4_BMNAME)) {
+					if (!strcmp(rootdir->di_fname,
+						    QNX4_BMNAME)) {
 						found = 1;
 						qnx4_sb(sb)->BitMap = kmalloc( sizeof( struct qnx4_inode_entry ), GFP_KERNEL );
 						if (!qnx4_sb(sb)->BitMap) {