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-rw-r--r--src/newgrf.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 10326ef7a..ee8e35526 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -3199,6 +3199,10 @@ static void SkipIf(byte *buf, int len)
break;
case 5: result = (param_val & mask) > cond_val;
break;
+ case 11: result = GetCargoIDByLabel(BSWAP32(cond_val)) == CT_INVALID;
+ break;
+ case 12: result = GetCargoIDByLabel(BSWAP32(cond_val)) != CT_INVALID;
+ break;
default: grfmsg(1, "SkipIf: Unsupported test %d. Ignoring", condtype); return;
}