[#2803] Missing header in accountconfigdialog.c

Missing prototype create_codecs_configuration cause
launchad build-system failure

sflphone-client-gnome/src/config/accountconfigdialog.c

@@ -22,6 +22,7 @@
 #include <actions.h>
 #include <mainwindow.h>
 #include <accountlist.h>
+#include <audioconf.h>
 #include <accountconfigdialog.h>
 #include <zrtpadvanceddialog.h>
 #include <tlsadvanceddialog.h>