From ab7ea3c8367dad3101a250bfe6873753ba1875b1 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 00:34:48 -0400
Subject: tk: Make event callbacks optional

---
(limited to 'src/tk/radio.c')

diff --git a/src/tk/radio.c b/src/tk/radio.c
index 71c9486..27f7d37 100644
--- a/src/tk/radio.c
+++ b/src/tk/radio.c
@@ -53,6 +53,9 @@ _mftk_radio_state_change(void *user_data, int state)
 		mftk_check_set_state(rs->r->children[rs->r->state], SDL_FALSE);
 		/* Set and announce new state */
 		rs->r->state = rs->state;
+		if (rs->r->action == NULL) {
+			return 0;
+		}
 		return rs->r->action(rs->r->user_data, rs->r->state);
 	}
 }
--
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