common/types.h: Wrap #define UUID_STR_LEN 36 in #ifndef

Current Fedora 28 has the constant it in uuid/uuid.h where it belongs (per
comment next to the define), so we should treat the define as a
backward-compatibility workaround, rather than enforcing it for all.

Signed-off-by: Jan Tulak <>
[sandeen: tweak comment to match]
Reviewed-by: Eric Sandeen <>
Signed-off-by: Eric Sandeen <>
1 file changed