Don't silently clip the range argument to int32 before

storing it internally as an int64 (improve future compatibility
with sampling from huge tensors.  Note that this CL isn't enough
to permit huge tensors, because we also clip their size at
other points in the process, but it's a step forward.)
Change: 117953355

tensorflow/core/kernels/range_sampler.h

@@ -36,7 +36,7 @@ class Env;
 // [0, range)
 class RangeSampler {
  public:
-  explicit RangeSampler(int range) : range_(range) { CHECK_GT(range_, 0); }
+  explicit RangeSampler(int64 range) : range_(range) { CHECK_GT(range_, 0); }
   virtual ~RangeSampler();
 
   // Sample a single value