pidgin/pidgin

Fix an issue where GtkIMHtmlScalables were not properly cleaned up which lead to a crash

Fix an issue where `GtkIMHtmlScalables` were not properly cleaned up which lead to a crash

Testing Done:
Followed the reproduction steps from https://issues.imfreedom.org/issue/PIDGIN-17446, found the issue with valgrind and merged the delete functions so that they actually make sense and I was unable to reproduce the issue again.

Bugs closed: PIDGIN-17446

Reviewed at https://reviews.imfreedom.org/r/514/
FROM pidgin/release-builder:release-2.x.y AS build
COPY . /pidgin
RUN set -ex && \
cd /pidgin && \
./autogen.sh --enable-debug && \
make -s -j$(nproc) docs
FROM rwgrim/goserve
EXPOSE 3000
COPY --from=build /pidgin/doc/html html