last shown image hangs if asset list was cleared

[pain64]

[IRTermite]

I've also seen it force a reboot on this hang... done it a number of times. Guess that is a watchdog function?

[vpetersson]

@IRTermite We are using the watchdog device on the Raspberry Pi. The watchdog however is triggered on CPU load (if the load average exceeds certain levels). This may or may not be related to this bug.

[pain64]

@IRTermite, @vpetersson it's scheduler-related

[vpetersson]

@over64 cool. Alright. It's in this sprint so let's sort it out.

[antonmolodykh]

@vpetersson the problem is related to the fact that the loading.jpg is missed

[vpetersson]

@antonmolodykh Interesting. Where is loading.jpg used?

Regardless, let's create a pull request and assign it to this Issue.

[antonmolodykh]

@vpetersson loading.jpg is used in the asset_loop function in viewer.py, in case when the list of asset is empty. I mean that loading desired picture into the project directory is enough to solve the problem (I do not know which picture)

[vpetersson]

I'm not sure what happened to loading.jpg. It used to be the image we displayed when the playlist was empty. I've created a new one (loading.png). Let's implement it instead.