There is no eye of newt or toe of frog in Roald Dahl’s The Witches, Robert Zemeckis’ take on the 1983 book — just a mischief of mice, a cantankerous cat, and an occasional s-s-snake. Within minutes, Zemeckis has created a vibrantly inhabited world, even if the golden oldies on the soundtrack are overly familiar, as is his habit, and …