A-Netz: Don't allow emphasis, since it is not used with A-Netz

src/anetz/main.c

@@ -117,6 +117,9 @@ int main(int argc, char *argv[])
 	const char *station_id = "";
 	int i;
 
+	/* a-netz does not use emphasis, so disable it */
+	uses_emphasis = 0;
+
 	/* init common tones */
 	init_freiton();
 	init_besetzton();