[geary/mjog/logging-update: 4/8] Add Geary.Logging.Source::log method

[Michael Gratton <mjog src gnome org>]

commit 778a06af7744845c87f2b4c0ad7558302dc0b5d0
Author: Michael Gratton <mike vee net>
Date:   Mon Dec 2 11:42:15 2019 +1100

    Add Geary.Logging.Source::log method
    
    Generic method allows custom level and flags to be specified.

 src/engine/util/util-logging.vala | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/src/engine/util/util-logging.vala b/src/engine/util/util-logging.vala
index 30ff8ffe..ef823705 100644
--- a/src/engine/util/util-logging.vala
+++ b/src/engine/util/util-logging.vala
@@ -203,6 +203,16 @@ public interface Geary.Logging.Source : GLib.Object {
         );
     }
 
+    /**
+     * Logs a message with this object as context.
+     */
+    [PrintfFormat]
+    public inline void log(Logging.Flag flags,
+                           GLib.LogLevelFlags levels,
+                           string fmt, ...) {
+        log_structured(flags, levels, fmt, va_list());
+    }
+
     private inline void log_structured(Logging.Flag flags,
                                        GLib.LogLevelFlags levels,
                                        string fmt,