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-rw-r--r--src/ai/api/ai_engine.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/ai/api/ai_engine.cpp b/src/ai/api/ai_engine.cpp
index 5e0ac5b4a..64c85de04 100644
--- a/src/ai/api/ai_engine.cpp
+++ b/src/ai/api/ai_engine.cpp
@@ -15,7 +15,8 @@
/* static */ bool AIEngine::IsValidEngine(EngineID engine_id)
{
- return ::IsEngineIndex(engine_id) && HasBit(::Engine::Get(engine_id)->company_avail, _current_company);
+ const Engine *e = ::Engine::GetIfValid(engine_id);
+ return e != NULL && HasBit(e->company_avail, _current_company);
}
/* static */ char *AIEngine::GetName(EngineID engine_id)