turns out you actually have to free/destroy mutexes. who woulda thunk?

daemon/aux.h

@@ -153,6 +153,7 @@ typedef GStaticRWLock rwlock_t;
 typedef GCond *cond_t;
 
 #define mutex_init(m) g_static_mutex_init(m)
+#define mutex_destroy(m) g_static_mutex_free(m)
 #define mutex_lock(m) g_static_mutex_lock(m)
 #define mutex_trylock(m) g_static_mutex_trylock(m)
 #define mutex_unlock(m) g_static_mutex_unlock(m)
@@ -176,6 +177,7 @@ typedef GRWLock rwlock_t;
 typedef GCond cond_t;
 
 #define mutex_init(m) g_mutex_init(m)
+#define mutex_destroy(m) g_mutex_clear(m)
 #define mutex_lock(m) g_mutex_lock(m)
 #define mutex_trylock(m) g_mutex_trylock(m)
 #define mutex_unlock(m) g_mutex_unlock(m)

daemon/call.c

@@ -1108,6 +1108,7 @@ static void callstream_free(void *ptr) {
 			release_port(r);
 		}
 	}
+	mutex_destroy(&s->lock);
 	obj_put(s->call);
 }
 
@@ -1465,6 +1466,7 @@ static void call_free(void *p) {
 		free(c->called_agent);
 	g_queue_free(c->callstreams);
 	free(c->callid);
+	mutex_destroy(&c->lock);
 }
 
 static struct call *call_create(const char *callid, struct callmaster *m) {

daemon/control.c

@@ -204,6 +204,7 @@ static void control_stream_free(void *p) {
 	close(s->fd);
 	streambuf_destroy(s->inbuf);
 	streambuf_destroy(s->outbuf);
+	mutex_destroy(&s->lock);
 }
 
 static void control_incoming(int fd, void *p, uintptr_t u) {