remove an assignment which is never used.
Update README.md
Merge pull request #4005 from Telepatheic/patch-1

Update README.md
Move assert(pindexNew); to above where we dereference pindexNew.
Merge pull request #4010

94c8bfb Move assert(pindexNew); to above where we dereference pindexNew. (Gregory Maxwell)
Merge pull request #3972

fbf617a remove an assignment which is never used. (Yoichi Hirai)