Fix buffer overrun in event_payload_pool_test.c

[NicoBiernat]

In test: test_allocate_reserved (buffer size too small)

Fixes issue #353

[erlingrj]

Nice catch!

[erlingrj]

Some of the CI errors are expected since @NicoBiernat is not a maintainer and thus we get some permission issues wrt generating comments on the PR with coverage etc. We should look into that.

But I am seeing two failures when running LFC on Federated Templates and PATMOS. Do you recognize this @tanneberger ?

lfc: fatal error: Error running generator
java.util.NoSuchElementException: List is empty.
	at kotlin.collections.CollectionsKt___CollectionsKt.first(_Collections.kt:214)
	at org.lflang.generator.uc.UcGeneratorFederated.doGenerate(UcGeneratorFederated.kt:133)
	at org.lflang.generator.LFGenerator.doGenerate(LFGenerator.java:65)
	at org.eclipse.xtext.generator.GeneratorDelegate.doGenerate(GeneratorDelegate.java:44)
	at org.eclipse.xtext.generator.GeneratorDelegate.generate(GeneratorDelegate.java:35)
	at org.lflang.cli.Lfc.invokeGenerator(Lfc.java:234)
	at org.lflang.cli.Lfc.doRun(Lfc.java:193)
	at org.lflang.cli.CliBase.run(CliBase.java:124)
	at picocli.CommandLine.executeUserObject(CommandLine.java:2026)
	at picocli.CommandLine.access$1500(CommandLine.java:148)
	at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2461)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2453)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2415)
	at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2273)
	at picocli.CommandLine$RunLast.execute(CommandLine.java:2417)
	at picocli.CommandLine.execute(CommandLine.java:2170)
	at org.lflang.cli.CliBase.doExecute(CliBase.java:115)
	at org.lflang.cli.CliBase.cliMain(CliBase.java:107)
	at org.lflang.cli.Lfc.main(Lfc.java:181)
	at org.lflang.cli.Lfc.main(Lfc.java:171

[tanneberger]

@erlingrj yeah the CI errors are not caused by this PR, they come from something previously merged, but I wasn't yet able to fully fix the issue.