bitcoin/bitcoin — pull request #4261 by 4tar (2014-05-30 15:52:15+00:00)
Title: Use pnode->nLastRecv as sync score directly

NodeSyncScore() should find the node which we recv data most recently, so put a negative sign to pnode->nLastRecv is indeed wrong.

Also change the return value type to int64_t.

Signed-off-by: Huang Le <4tarhl@gmail.com>