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module-alsa-card: Set a minimum profile priority if it's not set

Kai-Heng Feng requested to merge khfeng/pulseaudio:profile-priority into master

If the profile is generated from UCM, the priority won't be set so it stays as 0.

Assume a card has two available profiles, when the selected one becomes unavailable, module-switch-on-port-available's find_best_profile() should pick the next available one. However, since the priority is 0, the "off" profile was chosen instead of the available one.

So let's set the priority to 1 to make profile that is available has higher priority than "off" profile.

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