+ Fix memory management in the Input Capture portal code
+ Correct the type used for GObject signal connections
+ Remove wrong (closure) annotations, fixing
GObject-Introspection warnings
+ Don't require a C++ compiler for the build architecture
+ Fix Meson warnings
+ Consistently use #pragma once
+ Initialize all g_autoptr variables
OBS-URL: https://build.opensuse.org/package/show/GNOME:Factory/libportal?expand=0&rev=22
