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checksrc: handle zero scoped ignore commands #3096
Fix by instead treating a zero ignore as a a bad command and throw a warning for that one.
If a !checksrc! disable command specified to ignore zero errors, it was still added to the ignore block even though nothing was ignored. While there were no blocks ignored that shouldn't be ignored, the processing ended with with a warning. Fix by instead treating a zero ignore as a a badcommand and throw a warning for that one. <filename>:<line>:<col>: warning: Unused ignore: LONGLINE (UNUSEDIGNORE) /* !checksrc! disable LONGLINE 0 */ ^