Fix crashes in Clear Sky after e3868c2 (#382, #392)

src/xrGame/alife_anomalous_zone.cpp

@@ -77,10 +77,19 @@ void CSE_ALifeAnomalousZone::spawn_artefacts()
  typedef buffer_vector<Weight> Weights;
  Weights weights(xr_alloca(n * sizeof(Weight)), n);
 
+ u32 missing_artefacts = 0;
  for (u32 i = 0; i < n; ++i)
  {
  string256 temp0, temp1;
  _GetItem(artefacts, 2 * i + 0, temp0);
+ if (!pSettings->section_exist(temp0))
+ {
+#ifndef MASTER_GOLD
+ Msg("! [%s] wants to spawn artefact [%s] with missing INI section.", name(), temp0);
+#endif
+ ++missing_artefacts;
+ continue;
+ }
  _GetItem(artefacts, 2 * i + 1, temp1);
  weights.push_back(
  std::make_pair(
@@ -89,6 +98,7 @@ void CSE_ALifeAnomalousZone::spawn_artefacts()
  )
  );
  }
+ n -= missing_artefacts;
 
  for (u32 i = 0; i < artefact_count; ++i)
  {