fixed cast error (#2186)

fc789e04 · Nikita Titov · Guolin Ke · 6a1a538f · fc789e04
Commit fc789e04 authored May 22, 2019 by Nikita Titov Committed by Guolin Ke May 22, 2019
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src/io/file_io.cpp src/io/file_io.cpp +1 -1

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--- a/src/io/file_io.cpp
+++ b/src/io/file_io.cpp
@@ -98,7 +98,7 @@ struct HDFSFile : VirtualFileReader, VirtualFileWriter {

  template <typename BufferType>
  inline size_t FileOperation(BufferType data, size_t bytes, fileOp<BufferType> op) const {
-    char* buffer = reinterpret_cast<char *>(data);
+    char* buffer = const_cast<char*>(static_cast<const char*>(data));
    size_t remain = bytes;
    while (remain != 0) {
      size_t nmax = static_cast<size_t>(std::numeric_limits<tSize>::max());