Public bug reported:
In cheese, if you have no device plugged in, it gives you a warning
message up the top, and disables the "take photo" button. Oddly, if you
press the escape key, the button becomes enabled. Furthermore, clicking
the button when enabled, but no device plugged in, assumes that a device
is plugged in, and cheese segfaults.
Steps to reproduce:
1. make sure no camera devices attached
2. open cheese
3. observe how 'take photo' is disabled
4. press escape key
5. observe how 'take photo' is enabled (shouldn't be!)
6. press 'take photo'
7. observe segfault
There is no real need to change the code to double-check for a device
before taking a photo - we can just prevent the button from being
enabled on 'escape' and all should be good.
** Affects: ubuntu
Importance: Undecided
Status: In Progress
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cheese: no device found, press escape, take photo, segmentation fault
https://bugs.launchpad.net/bugs/670759
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