Fix warnings in coding

1 files changed, 1 insertions, 1 deletions

diff --git a/coding/zlib.cpp b/coding/zlib.cpp
index e1646d2f91..f54cc574b4 100644
--- a/coding/zlib.cpp
+++ b/coding/zlib.cpp
@@ -25,7 +25,7 @@ ZLib::Processor::Processor(void const * data, size_t size) noexcept : m_init(fal
   // zconf.h. So, for portability, const_cast<...> is used here, but
   // in any case, zlib does not modify |data|.
   m_stream.next_in = static_cast<unsigned char *>(const_cast<void *>(data));
-  m_stream.avail_in = size;
+  m_stream.avail_in = static_cast<unsigned int>(size);
 
   m_stream.next_out = m_buffer;
   m_stream.avail_out = kBufferSize;