Fri, 29 Jul 2022 04:07:20 -0500
Fix Meson deprecation from Facebook docs
Fixes this deprecation:
```
../doc/reference/protocols/facebook/meson.build:25: WARNING: Project targeting '>=0.58.0' but tried to use feature deprecated since '0.56.0': meson.build_root. use meson.project_build_root() or meson.global_build_root() instead.
```
Testing Done:
Reconfigured and saw no warning.
Reviewed at https://reviews.imfreedom.org/r/1555/
Title: Command Signals Slug: command-signals ## Command Signals ### Signal List * [cmd-added](#cmd-added) * [cmd-removed](#cmd-removed) ### Signal Details #### cmd-added ```c void user_function(const gchar *command, PurpleCmdPriority priority, PurpleCmdFlag flag, gpointer user_data); ``` Emitted when a new command is added. **Parameters:** **command** : The new command. **priority** : The priority of the new command. **flag** : The command flags. **user_data** : User data set when the signal handler was connected. ---- #### cmd-removed ```c void user_function(const gchar *command, gpointer user_data); ``` Emitted when a command is removed. **Parameters:** **command** : The removed command. **user_data** : User data set when the signal handler was connected.