fix compile warning for HDFS version (#2586)

* fix compile warning for HDFS version * cast to size_t

fix compile warning for HDFS version (#2586)
* fix compile warning for HDFS version * cast to size_t
f5df1df3 · Nikita Titov · GitHub · b3975555 · f5df1df3
Unverified Commit f5df1df3 authored Nov 30, 2019 by Nikita Titov Committed by GitHub Nov 30, 2019
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src/io/file_io.cpp src/io/file_io.cpp +2 -1

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--- a/src/io/file_io.cpp
+++ b/src/io/file_io.cpp
@@ -55,9 +55,10 @@ struct LocalFile : VirtualFileReader, VirtualFileWriter {
 };
 const char* kHdfsProto = "hdfs://";
-const size_t kHdfsProtoLength = strlen(kHdfsProto);
 #ifdef USE_HDFS
+const size_t kHdfsProtoLength = static_cast<size_t>(strlen(kHdfsProto));
 struct HDFSFile : VirtualFileReader, VirtualFileWriter {
  HDFSFile(const std::string& filename, int flags) : filename_(filename), flags_(flags) {}
  ~HDFSFile() {