pidgin/pidgin

Fix some issues scanbuild found in the silc protocol plugin
release-2.x.y
2021-06-02, Gary Kramlich
40211e37a935
Fix some issues scanbuild found in the silc protocol plugin

Testing Done:
Verified that scanbuild no longer detected the errors.

Reviewed at https://reviews.imfreedom.org/r/712/
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.