This has nothing to do with awnlib. It's just Volume Control that wants to set an svg icon that doesn't exist. However, volume-control in the rewrite branch (which will be merged with trunk -- meaning that testing PPA's will appear then) uses themed icons. This means that the code will display an appropriate icon or a "missing icon" icon, but it shouldn't crash then. So just wait for PPA's (of Awn Extras 0.4) to appear.
This has nothing to do with awnlib. It's just Volume Control that wants to set an svg icon that doesn't exist. However, volume-control in the rewrite branch (which will be merged with trunk -- meaning that testing PPA's will appear then) uses themed icons. This means that the code will display an appropriate icon or a "missing icon" icon, but it shouldn't crash then. So just wait for PPA's (of Awn Extras 0.4) to appear.