fix implicit conversion in TensorChipping
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorChipping.h b/unsupported/Eigen/CXX11/src/Tensor/TensorChipping.h
index f5172cd..5db563d 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorChipping.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorChipping.h
@@ -177,7 +177,7 @@
// Check if chipping is effectively inner or outer: products of dimensions
// before or after the chipped dimension is `1`.
Index after_chipped_dim_product = 1;
- for (int i = m_dim.actualDim() + 1; i < NumInputDims; ++i) {
+ for (int i = static_cast<int>(m_dim.actualDim()) + 1; i < NumInputDims; ++i) {
after_chipped_dim_product *= input_dims[i];
}