[Crash fix] Unit in world check for manual set value

src/strategy/Value.cpp

@@ -136,4 +136,12 @@ Unit* UnitCalculatedValue::Get()
     if (value && value->IsInWorld())
         return value;
     return nullptr;
+}
+
+Unit* UnitManualSetValue::Get()
+{
+    // Prevent crashing by InWorld check
+    if (value && value->IsInWorld())
+        return value;
+    return nullptr;
 }

src/strategy/Value.h

@@ -323,6 +323,7 @@ class UnitManualSetValue : public ManualSetValue<Unit*>
             ManualSetValue<Unit*>(botAI, defaultValue, name) { }
 
         std::string const Format() override;
+        Unit* Get() override;
 };
 
 #endif