Fixes broken iio_context_add_device() in local.c

[catkira]

PR Description

fixes issue https://github.com/analogdevicesinc/libiio/issues/1172

PR Type

• [x] Bug fix (a change that fixes an issue)
• [ ] New feature (a change that adds new functionality)
• [ ] Breaking change (a change that affects other repos or cause CIs to fail)

PR Checklist

• [x] I have conducted a self-review of my own code changes
• [ ] I have commented new code, particulary complex or unclear areas
• [ ] I have checked that I did not intoduced new warnings or errors (CI output)
• [ ] I have checked that components that use libiio did not get broken
• [ ] I have updated the documentation accordingly (GitHub Pages, READMEs, etc)

[pcercuei]

The fix makes sense to me, thanks! Good catch!

If you know how, can you squash the commits into one, and add a proper Signed-off-by line with your real name for copyright attribution?

[catkira]

yes I can do that.

ps: It would be nice if u could have a look at the other open issue about iiod crashes, thats not so easy for me to fix :)

[pcercuei]

Note that I don't work at ADI anymore ;) But somebody should fix these errors, yes.

[catkira]

yes I know, just one last courtesy fix ;)

[catkira]

If you know how, can you squash the commits into one, and add a proper Signed-off-by line with your real name for copyright attribution?

done.