cn/r part 1 of 2.

src/backend/opencl/kernels/Cn1Kernel.h

@@ -36,6 +36,7 @@ class Cn1Kernel : public OclKernel
 {
 public:
     Cn1Kernel(cl_program program);
+    Cn1Kernel(cl_program program, uint64_t height);
     bool enqueue(cl_command_queue queue, uint32_t nonce, size_t threads, size_t worksize);
     bool setArgs(cl_mem input, cl_mem scratchpads, cl_mem states, uint32_t threads);
 };