Word of a renewal trickled out just before the season, but neither the team nor the bank confirmed a new contract was in place. Now both sides say it’s a done deal, giving the Bobcats their first renewal among the NBA franchise’s core corporate backers. Designated as founding-level sponsors, Wells Fargo inherited the relationship after buying Charlotte-based Wachovia Corp. at the end of 2008. The original sponsorship expired before the current season.