fix fatal error on wrong placement args

src/logic/scripting/scripting_world_generation.cpp

@@ -196,6 +196,7 @@ public:
         
         stackguard _(L);
         pushenv(L, *env);
+        try {
             if (getfield(L, "place_structures_wide")) {
                 pushivec_stack(L, offset);
                 pushivec_stack(L, size);
@@ -212,6 +213,9 @@ public:
                     pop(L);
                 }
             }
+        } catch (const std::runtime_error& err) {
+            logger.error() << err.what();
+        }
         return placements;
     }