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-rw-r--r--src/newgrf_callbacks.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/newgrf_callbacks.h b/src/newgrf_callbacks.h
index 3dffdcf03..b21b29f8e 100644
--- a/src/newgrf_callbacks.h
+++ b/src/newgrf_callbacks.h
@@ -297,10 +297,11 @@ enum IndustryTileCallbackMask {
};
/**
- * Result of a failed callback.
+ * Different values for Callback result evaluations
*/
enum {
- CALLBACK_FAILED = 0xFFFF
+ CALLBACK_FAILED = 0xFFFF, ///< Result of a failed callback.
+ CALLBACK_HOUSEPRODCARGO_END = 0x20FF, ///< Sentinel indicating that the loop for CBID_HOUSE_PRODUCE_CARGO has ended
};
#endif /* NEWGRF_CALLBACKS_H */