Fix hasMessageAvailable incorrectly returns true when read to latest after seeking by timestamp #945

Job	Run time
Formatting Check	1m 39s
Lint	28m 3s
Build the Wireshark dissector (ubuntu-latest)	1m 2s
Run unit tests	17m 33s
Build CPP Client on Windows x86	30m 18s
Build CPP Client on Windows x64	32m 13s
Build CPP Client on macOS with static dependencies	6m 47s
Build with the C++20 standard	5m 34s
Build RPM x86_64	10m 32s
Build Alpine x86_64	11m 40s
Build Deb x86_64	11m 44s
Check Completion	3s
	2h 37m 8s

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