NSS: fix parsing of note stop action for ADPCM-A #72

Job	Run time
macOS build	1m 45s
Windows native MSYS2 build	4m 23s
Linux build	1m 47s
deb: trigger Launchpad rebuild	3s
brew: trigger bottle rebuild	6s
rpm: trigger COPR rebuild	5s
msys2: trigger package rebuild	8s
Cleanup tags and artefacts	4s
	8m 21s

Provide feedback