lib: fix inconsistent indenting in process_bit1()

Smatch gives the warning:
	lib/decompress_unlzma.c:395 process_bit1() warn: inconsistent indenting

Link: https://lkml.kernel.org/r/1614567775-4478-1-git-send-email-wangqing@vivo.comSigned-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>