Stalin Stops For Tea? - He looks like Marshal Stalin in his jovial mood. But the sam over is oddly un-Russian, and the man with the uncanny resemblance to the Soviet leader is, in fact, Stanislav Zienciakiewicz, 46-year-old Polish actor who is portraying the Soviet leader in the new British film 'Top Secret'. He is seen pouring himself a cup of tea from the Wagon on the set at Elstree Studios, Hertfordshire. Zienciakiewicz has played Stalin several times before in London revues. His measurement