Fix matmal_op for debug mode

The dimension is not set correctly and is not being checked in release mode because eigen_assert is not enabled.

Author: xuwei06

paddle/operators/matmul_op.h

@@ -74,11 +74,10 @@ Tensor CombineBatchAndN(const framework::ExecutionContext& context,
   Tensor output;
   auto in_dims = input.dims();
   if (in_dims.size() == 3) {
-    output.Resize(in_dims);
+    output.Resize({in_dims[1], in_dims[0], in_dims[2]});
     output.mutable_data<T>(context.GetPlace());
     EigenTranspose<Place, T, 3>(context, input, output, {1, 0, 2});
-    std::vector<int64_t> out_dims = {in_dims[1], in_dims[0] * in_dims[2]};
-    output.Resize(make_ddim(out_dims));
+    output.Resize({in_dims[1], in_dims[0] * in_dims[2]});
   } else {
     output.ShareDataWith(input);
   }