Barely an hour after he was pounding the floor and then limping into the locker room, Jordan Bell was sitting in the Warriors locker room cussing through a smile on his face. What looked to be a devastating ankle injury sustained Tuesday night in a 114-101 victory over the Nets was deemed “mild” and will cost Bell only a few games. Based on his immediate and demonstrative reaction, there was fear of the worst. Bell underwent X-rays, after which he was diagnosed the “mild” sprain. He won’t even be fitted for a protective boot. “I knew it was mild,” Bell said, “but I was just frustrated after just coming back from the same injury.” Bell missed 14 games after sustaining a severe ankle injury on Jan. 17 at Chicago. He returned last week, averaging about nine minutes in the three games on the road trip. Bell breathed a sigh of relief. The Warriors had their reasons for exhaling more deeply. Bell likely will have a significant role down the stretch of the regular season and almost certainly in the postseason.