Fix another latent bug in Regexp::Walker<T>::Reset().

Change-Id: I41ade89efd93fed2a704d718659476eeb9fe6f83
Reviewed-on: https://code-review.googlesource.com/c/re2/+/59390
Reviewed-by: Perry Lorier <perryl@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>
1 file changed