fs/isofs/namei.c: Remove uninitialized local vars warning

shut up those:
fs/isofs/namei.c: In function 'isofs_lookup':
fs/isofs/namei.c:161: warning: 'offset' may be used uninitialized in this function
fs/isofs/namei.c:161: warning: 'block' may be used uninitialized in this function

By the way, they get overwritten at the end of isofs_find_entry().

Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
index c8c7e51..e2b4dad 100644
--- a/fs/isofs/namei.c
+++ b/fs/isofs/namei.c
@@ -158,7 +158,8 @@
 struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
 	int found;
-	unsigned long block, offset;
+	unsigned long uninitialized_var(block);
+	unsigned long uninitialized_var(offset);
 	struct inode *inode;
 	struct page *page;