moc aborts or fails to start when system volume is high

[Christopher Barrington-Leigh]

When launching the audio player moc, when Ubuntu's volume is set to be allowed to go over "100%", and when it is over 100%, the player fails to launch, with:

```
Running the server...
Trying JACK...
Trying ALSA...
mocp: alsa.c:319: alsa_read_mixer_raw: Assertion `RANGE(0, vol, 100)' failed.

FATAL_ERROR: Server exited!

```

Similarly, when using the player, if the system volume is increased over the "100%" mark, e.g. using the keyboard/OS volume keys, the player crashes.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: moc 1:2.6.0~svn-r3005-1
ProcVersionSignature: Ubuntu 5.15.0-56.62-generic 5.15.64
Uname: Linux 5.15.0-56-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Dec 26 08:15:20 2022
EcryptfsInUse: Yes
InstallationDate: Installed on 2022-09-02 (114 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
SourcePackage: moc
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.