Add note about AT_CHECK/AT_ASSERT for PyTorch master

Author: goldsborough

cuda/lltm_cuda.cpp

@@ -24,6 +24,7 @@ std::vector<at::Tensor> lltm_cuda_backward(
 
 // C++ interface
 
+// NOTE: AT_ASSERT has become AT_CHECK on master after 0.4.
 #define CHECK_CUDA(x) AT_ASSERT(x.type().is_cuda(), #x " must be a CUDA tensor")
 #define CHECK_CONTIGUOUS(x) AT_ASSERT(x.is_contiguous(), #x " must be contiguous")
 #define CHECK_INPUT(x) CHECK_CUDA(x); CHECK_CONTIGUOUS(x)