map.cpp: Initialize NodeNeighbor, set NeighborType to u8 & cleanup

Cleanup:
* Drop unused Map::transforming_liquid_size()
* NodeNeighbor must use const ref for v3s16
* Add a missing default in a switch case

src/map.cpp

@@ -512,22 +512,22 @@ void Map::PrintInfo(std::ostream &out)
 
 #define WATER_DROP_BOOST 4
 
-enum NeighborType {
+enum NeighborType : u8 {
 	NEIGHBOR_UPPER,
 	NEIGHBOR_SAME_LEVEL,
 	NEIGHBOR_LOWER
 };
+
 struct NodeNeighbor {
 	MapNode n;
 	NeighborType t;
 	v3s16 p;
-	bool l; //can liquid
 
 	NodeNeighbor()
-		: n(CONTENT_AIR)
+		: n(CONTENT_AIR), t(NEIGHBOR_SAME_LEVEL)
 	{ }
 
-	NodeNeighbor(const MapNode &node, NeighborType n_type, v3s16 pos)
+	NodeNeighbor(const MapNode &node, NeighborType n_type, const v3s16 &pos)
 		: n(node),
 		  t(n_type),
 		  p(pos)
@@ -538,10 +538,6 @@ void Map::transforming_liquid_add(v3s16 p) {
         m_transforming_liquid.push_back(p);
 }
 
-s32 Map::transforming_liquid_size() {
-        return m_transforming_liquid.size();
-}
-
 void Map::transformLiquids(std::map<v3s16, MapBlock*> &modified_blocks,
 		ServerEnvironment *env)
 {
@@ -645,6 +641,8 @@ void Map::transformLiquids(std::map<v3s16, MapBlock*> &modified_blocks,
 				case 4:
 					nt = NEIGHBOR_LOWER;
 					break;
+				default:
+					break;
 			}
 			v3s16 npos = p0 + dirs[i];
 			NodeNeighbor nb(getNodeNoEx(npos), nt, npos);

src/map.h

@@ -289,7 +289,6 @@ class Map /*: public NodeContainer*/
 	*/
 
 	void transforming_liquid_add(v3s16 p);
-	s32 transforming_liquid_size();
 
 	bool isBlockOccluded(MapBlock *block, v3s16 cam_pos_nodes);
 protected: