Bug fixed for Gather functions.

source/tensor/core/movement/Gather.cu

@@ -139,7 +139,7 @@ void _CudaGather(const XTensor * s, XTensor * t, XTensor * srcIndex)
     }
     else {
         int * sIndexData = new int[sizeof(int) * indexSize];
-        XMemCopy(sIndexData, -1, srcIndex, srcIndex->devID, sizeof(int) * indexSize);
+        XMemCopy(sIndexData, -1, srcIndex->data, srcIndex->devID, sizeof(int) * indexSize);
         for (int i = 0; i < indexSize; i++) {
             int srcIndexValue = sIndexData[i] * stride;
             CheckNTErrors(srcIndexValue < s->unitNum, "Wrong index!");