Fix PlayerMPD.prev/next() when stopped (#2326) #409

Job	Run time
bookworm armv7 / build	13m 4s
bullseye armv7 / build	12m 40s
bullseye armv7 / test (run_install_common.sh)	14m 26s
bullseye armv7 / test (run_install_faststartup.sh)	11m 9s
bullseye armv7 / test (run_install_webapp_local.sh)	22m 9s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 52s
bullseye armv7 / test (run_install_libzmq_local.sh)	24m 13s
bookworm armv7 / test (run_install_common.sh)	15m 9s
bookworm armv7 / test (run_install_faststartup.sh)	11m 7s
bookworm armv7 / test (run_install_webapp_local.sh)	21m 56s
bookworm armv7 / test (run_install_webapp_download.sh)	14m 42s
bookworm armv7 / test (run_install_libzmq_local.sh)	26m 10s
bullseye armv7 / cleanup	4s
bookworm armv7 / cleanup	2s
	3h 21m 43s

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