lib/xz: Move s->lzma.len = 0 initialization to lzma_reset()

It's a more logical place even if the resetting needs to be done
only once per LZMA2 stream (if lzma_reset() called in the middle
of an LZMA2 stream, .len will already be 0).

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lasse Collin <[e-mail]>
Signed-off-by: Gao Xiang <[e-mail]>

lib/xz/xz_dec_lzma2.c

···
 	s->lzma.rep1 = 0;
 	s->lzma.rep2 = 0;
 	s->lzma.rep3 = 0;
+	s->lzma.len = 0;
 
 	/*
 	 * All probabilities are initialized to the same value. This hack
···
 			}
 		}
 	}
-
-	s->lzma.len = 0;
 
 	s->lzma2.sequence = SEQ_CONTROL;
 	s->lzma2.need_dict_reset = true;