diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/powder.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/powder.c b/src/powder.c index 7f797d0..aabea34 100644 --- a/src/powder.c +++ b/src/powder.c @@ -384,7 +384,7 @@ int try_move(int i, int x, int y, int nx, int ny) if (parts[i].type==PT_NEUT) { // target material is NEUTPENETRATE, meaning it gets moved around when neutron passes unsigned s = pmap[y][x]; - if (!(ptypes[s&0xFF].properties&PROP_NEUTPENETRATE)) + if (s && !(ptypes[s&0xFF].properties&PROP_NEUTPENETRATE)) return 1; // if the element currently underneath neutron isn't NEUTPENETRATE, don't move anything except the neutron // if nothing is currently underneath neutron, only move target particle if (s) |