Remove console line before printing debugging and on exit

src/common/call.h

@@ -12,6 +12,7 @@ enum number_type {
 int call_init(const char *station_id, const char *sounddev, int samplerate, int latency, int dial_digits, int loopback);
 void call_cleanup(void);
 void process_call(int c);
+void clear_console_text(void);
 
 /* received messages */
 int call_in_setup(int callref, const char *callerid, const char *dialing);