fix destroy leak when using uart.

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@203 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/openzap/src/dsp/bell202.c

@@ -233,6 +233,10 @@ void dsp_bell202_destroy(dsp_bell202_handle_t **handle)
 		(*handle)->buffer = NULL;
 	}
 
+	if ((*handle)->attr.bytehandler) {
+		dsp_uart_destroy((dsp_uart_handle_t**)&(*handle)->attr.bithandler_arg);
+	}
+
 	free(*handle);
 	*handle = NULL;
 }