When message events were added, the debug field name was overlooked. This would…

When message events were added, the debug field name was overlooked. This would have only been hit when debug level was above 'DEBUG1' and at that point it would have incorrectly chosen debug display names.

src/switch_core_session.c

@@ -716,6 +716,7 @@ static const char *message_names[] = {
 	"JITTER_BUFFER",
 	"RECOVERY_REFRESH",
 	"SIGNAL_DATA",
+	"MESSAGE",
 	"INFO",
 	"AUDIO_DATA",
 	"BLIND_TRANSFER_RESPONSE",