Couple fixes to fs/ecryptfs/inode.c

Following was uncovered by compiling the kernel with '-W' flag:

CC [M] fs/ecryptfs/inode.o
fs/ecryptfs/inode.c: In function ‘ecryptfs_lookup’:
fs/ecryptfs/inode.c:304: warning: comparison of unsigned expression < 0 is always false
fs/ecryptfs/inode.c: In function ‘ecryptfs_symlink’:
fs/ecryptfs/inode.c:486: warning: comparison of unsigned expression < 0 is always false

Function ecryptfs_encode_filename() can return -ENOMEM, so change the
variables to plain int, as in the first case the only real use actually
expects int, and in latter case there is no use beoynd the error check.

Signed-off-by: Mika Kukkonen <[e-mail]>
Cc: Michael Halcrow <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/ecryptfs/inode.c

···
 	struct dentry *lower_dentry;
 	struct vfsmount *lower_mnt;
 	char *encoded_name;
-	unsigned int encoded_namelen;
+	int encoded_namelen;
 	struct ecryptfs_crypt_stat *crypt_stat = NULL;
 	struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
 	char *page_virt = NULL;
···
 	struct dentry *lower_dir_dentry;
 	umode_t mode;
 	char *encoded_symname;
-	unsigned int encoded_symlen;
+	int encoded_symlen;
 	struct ecryptfs_crypt_stat *crypt_stat = NULL;
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);