Mapgen V5: Fix use of uninitialized value in ctor

src/mapgen_v5.cpp

@@ -47,10 +47,10 @@ FlagDesc flagdesc_mapgen_v5[] = {
 };
 
 
-MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge_)
+MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge)
 	: Mapgen(mapgenid, params, emerge)
 {
-	this->emerge = emerge_;
+	this->emerge = emerge;
 	this->bmgr   = emerge->biomemgr;
 
 	// amount of elements to skip for the next index

src/mapgen_v5.h

@@ -89,7 +89,7 @@ class MapgenV5 : public Mapgen {
 	content_t c_stair_cobble;
 	content_t c_stair_sandstone;
 
-	MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge_);
+	MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge);
 	~MapgenV5();
 
 	virtual void makeChunk(BlockMakeData *data);