From a6d1fbf8d1d295a910a847d315eb11e4fa84e599 Mon Sep 17 00:00:00 2001
From: Jiaming Yuan <jm.yuan@outlook.com>
Date: Thu, 22 Apr 2021 02:57:23 +0800
Subject: [PATCH] Fix warning on Windows. (#6883)

---
 src/c_api/c_api.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/c_api/c_api.cc b/src/c_api/c_api.cc
index 0ccb63100..58d4dba15 100644
--- a/src/c_api/c_api.cc
+++ b/src/c_api/c_api.cc
@@ -734,8 +734,9 @@ XGB_DLL int XGBoosterPredictFromCSR(BoosterHandle handle, char const *indptr,
   API_BEGIN();
   CHECK_HANDLE();
   std::shared_ptr<xgboost::data::CSRArrayAdapter> x{
-      new xgboost::data::CSRArrayAdapter{
-          StringView{indptr}, StringView{indices}, StringView{data}, cols}};
+      new xgboost::data::CSRArrayAdapter{StringView{indptr},
+                                         StringView{indices}, StringView{data},
+                                         static_cast<size_t>(cols)}};
   std::shared_ptr<DMatrix> p_m {nullptr};
   if (m) {
     p_m = *static_cast<std::shared_ptr<DMatrix> *>(m);