Merge src/leveldb changes for LevelDB 1.18.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/leveldb/util/hash.cc b/src/leveldb/util/hash.cc
index 07cf022060..ed439ce7a2 100644
--- a/src/leveldb/util/hash.cc
+++ b/src/leveldb/util/hash.cc
@@ -34,13 +34,13 @@ uint32_t Hash(const char* data, size_t n, uint32_t seed) {
   // Pick up remaining bytes
   switch (limit - data) {
     case 3:
-      h += data[2] << 16;
+      h += static_cast<unsigned char>(data[2]) << 16;
       FALLTHROUGH_INTENDED;
     case 2:
-      h += data[1] << 8;
+      h += static_cast<unsigned char>(data[1]) << 8;
       FALLTHROUGH_INTENDED;
     case 1:
-      h += data[0];
+      h += static_cast<unsigned char>(data[0]);
       h *= m;
       h ^= (h >> r);
       break;