pidgin/pidgin

ddbeda158468
Apparently, some random servers have decided to send us an annotation
with no name, and the value isn't really self-describing either. Anyway,
this empty name could cause a crash.

Fixes #15126.
For information on writing a plugin for Purple, Pidgin or Finch, go
http://developer.pidgin.im and click on API. From there, see the
HOWTOs in the "Related Pages" section.
You can also generate this documentation locally by installing
doxygen and graphviz dot, then running "make docs" in the
source tree. The documentation will be in the docs/html directory.