xattr_handler: pass dentry and inode as separate arguments of ->get()

... and do not assume they are already attached to each other

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/squashfs/xattr.c

@@ -214,10 +214,12 @@ failed:
 
 
 static int squashfs_xattr_handler_get(const struct xattr_handler *handler,
-				      struct dentry *d, const char *name,
+				      struct dentry *unused,
+				      struct inode *inode,
+				      const char *name,
 				      void *buffer, size_t size)
 {
-	return squashfs_xattr_get(d_inode(d), handler->flags, name,
+	return squashfs_xattr_get(inode, handler->flags, name,
 		buffer, size);
 }