Vincent Dupont 98c39d5104 can: add proper checks for ifnum validity
Most functions were using asserts, but in some cases it might not be a
programmatic error to pass an invalid ifnum. This makes sure the code
does not crash by testing it at runtim and returning an error.
2020-09-30 12:59:02 +02:00
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2017-09-22 12:00:47 +02:00