fix compile error

paddle/fluid/platform/for_range.h

@@ -117,17 +117,18 @@ __global__ static void ForRangeInElemwiseOp(Function func, T* vector,
 
 template <>
 struct ForRangeIn<CUDADeviceContext> {
-  ForRange(const CUDADeviceContext& dev_ctx, std::vector<int64_t> range)
+  ForRangeIn(const CUDADeviceContext& dev_ctx, std::vector<int64_t> range)
       : dev_ctx_(dev_ctx), range_(range) {}
 
   template <typename Function>
   inline void operator()(Function func) const {
     constexpr int num_threads = 1024;
-    int block_size = range_.size() <= num_threads ? limit_ : num_threads;
+    int range_size = range_.size();
+    int block_size = range_size <= num_threads ? range_size : num_threads;
     int grid_size = (range_.size() + num_threads - 1) / num_threads;
 
     ForRangeInElemwiseOp<<<grid_size, block_size, 0, dev_ctx_.stream()>>>(
-        func, range_.data(), range_.size());
+        func, range_.data(), range_size);
   }
 
   const CUDADeviceContext& dev_ctx_;