mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r5440) -Backport: rev 5428 -Fix: [vehicles] sovled crash when trying to build a vehicle type, that is set to max 0 (spotted by roboman)
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@ -2025,6 +2025,14 @@ UnitID GetFreeUnitNumber(byte type)
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default: assert(0);
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}
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if (max == 0) {
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/* we can't build any of this kind of vehicle, so we just return 1 instead of looking for a free number
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* a max of 0 will cause the following code to write to a NULL pointer
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* We know that 1 is bigger than the max allowed vehicle number, so it's the same as returning something, that is too big
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*/
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return 1;
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}
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if (max > gmax) {
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gmax = max;
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free(cache);
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