commit f9756af54f66e33cd5a7beb324254f05470fc9a3
from: Omar Polo <op@omarpolo.com>
date: Thu Jul 21 13:47:51 2022 UTC

fix sndio detection

the compiler may complain that there's no return:

	tests.c: In function 'main':
	tests.c:954: warning: control reaches end of non-void function

spotted by the OpenBSD bulk builds on sparc64 (using gcc 4.2)

commit - 9e5765b739e853e7c6bf10d9e24f4641d033d660
commit + f9756af54f66e33cd5a7beb324254f05470fc9a3
blob - 5d8036db5374b2850ed18459fcb3be48ec5673fa
blob + fb75999b977009afe407604d9871ccf68cdd821f
--- tests.c
+++ tests.c
@@ -526,6 +526,7 @@ main(void)
 	hdl = sio_open(SIO_DEVANY, SIO_PLAY, 1);
 	sio_flush(hdl);
 	sio_close(hdl);
+	return 0;
 }
 #endif /* TEST_SIO_FLUSH */
 #if TEST_SCAN_SCALED
@@ -950,5 +951,6 @@ main(void)
 	struct sio_hdl *hdl;
 	hdl = sio_open(SIO_DEVANY, SIO_PLAY, 1);
 	sio_close(hdl);
+	return 0;
 }
 #endif /* TEST_LIB_SNDIO */