Replaced a std::hash specialization with explicit type.

std::hash is problematic in gcc / clang, one has a class, the other a struct.

src/ChunkDef.h

@@ -399,21 +399,17 @@ public:
 typedef std::list<cChunkCoords> cChunkCoordsList;
 typedef std::vector<cChunkCoords> cChunkCoordsVector;
 
-namespace std
-{
-
 /** A simple hash function for chunk coords, we assume that chunk coords won't use more than 16 bits, so the hash is almost an identity.
 Used for std::unordered_map<cChunkCoords, ...> */
-template<> struct hash<cChunkCoords>
+class cChunkCoordsHash
 {
-	size_t operator ()(const cChunkCoords & a_Coords)
+public:
+	size_t operator () (const cChunkCoords & a_Coords) const
 	{
 		return (static_cast<size_t>(a_Coords.m_ChunkX) << 16) ^ static_cast<size_t>(a_Coords.m_ChunkZ);
 	}
 };
 
-}  // namespace std
-
 
 
 

src/Entities/Player.cpp

@@ -2206,7 +2206,7 @@ void cPlayer::SendBlocksAround(int a_BlockX, int a_BlockY, int a_BlockZ, int a_R
 	}
 
 	// Divide the block changes by their respective chunks:
-	std::unordered_map<cChunkCoords, sSetBlockVector> Changes;
+	std::unordered_map<cChunkCoords, sSetBlockVector, cChunkCoordsHash> Changes;
 	for (const auto & blk: blks)
 	{
 		Changes[cChunkCoords(blk.m_ChunkX, blk.m_ChunkZ)].push_back(blk);