Cherry-pick fix for Pulseaudio OpenAL backend.

Telegram/build/docker/centos_env/Dockerfile

@@ -401,7 +401,7 @@ RUN make -j$(nproc)
 RUN make DESTDIR="$LibrariesPath/ffmpeg-cache" install
 
 FROM builder AS openal
-RUN git clone -b openal-soft-1.21.0 --depth=1 $GIT/kcat/openal-soft.git
+RUN git clone -b fix_pulse_default --depth=1 $GIT/telegramdesktop/openal-soft.git
 
 WORKDIR openal-soft
 RUN cmake3 -B build . \

snap/snapcraft.yaml

@@ -214,9 +214,9 @@ parts:
       - -./usr/share
 
   openal:
-    source: https://github.com/kcat/openal-soft.git
+    source: https://github.com/telegramdesktop/openal-soft.git
     source-depth: 1
-    source-tag: openal-soft-1.21.0
+    source-branch: fix_pulse_default
     plugin: cmake
     build-packages:
       - libasound2-dev