[Merge] ~mitya57/compiz:fix-ftbfs into compiz:master

[Dmitry Shachnev]

Dmitry Shachnev has proposed merging ~mitya57/compiz:fix-ftbfs into compiz:master.

Commit message:
Fix build failure with GCC 9 because of format-truncation warning.

Requested reviews:
  Alberts Muktupāvels (muktupavels)

For more details, see:
https://code.launchpad.net/~mitya57/compiz/+git/compiz/+merge/372943

- Removed -Wno-unused-private-field flag. This warning does not exist in GCC (only in clang), and the googletest code for which it was added in bug 1095906 was removed in https://github.com/google/googletest/commit/1b89db97058ced81.

- Fixed format-truncation error by increasing the buffer size from 10 to 18.

The previous failing build log can be seen here:

https://launchpad.net/ubuntu/+archive/test-rebuild-20190906/+build/17539053
-- 
Your team Compiz Maintainers is subscribed to branch compiz:master.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: review-diff.txt
Type: text/x-diff
Size: 1229 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/ubuntu-reviews/attachments/20190918/766dfcf8/attachment.diff>