April 28, 2014, 9:29 a.m. EDT Stock futures point to rise as drug stocks rally AstraZeneca leaps on renewed Pfizer interest; pending home sales ahead By Anora Mahmudova and Sara Sjolin, MarketWatch An earlier version of this article gave an incorrect number for Charter Communications revenue. The number has been corrected. NEW YORK (MarketWatch) — U.S. stock futures…