Ensure that heightmap is initialized before use

Without this, cavegen will use values in the heightmap before they are initialized.

diff --git a/src/mapgen_v6.cpp b/src/mapgen_v6.cpp
index 7f5be27ae83ad4b7d7597364f289337188804c06..d4b9201d936e51681338c72ab6b833816c850f02 100644 (file)
--- a/src/mapgen_v6.cpp
+++ b/src/mapgen_v6.cpp
@@ -56,6 +56,7 @@ MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
        this->ystride = csize.X; //////fix this
 
        this->heightmap = new s16[csize.X * csize.Z];
+       memset(this->heightmap, 0, csize.X * csize.Z * sizeof(*this->heightmap));
 
        MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
        this->spflags     = sp->spflags;