Fix background process status in Unix

Change the way background process detection is handled in systems
without signals or termios.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

src/main.c

@@ -28,7 +28,7 @@
 extern int optind;
 
 static struct sound_driver *sound;
-static unsigned int foreground_in = 1, foreground_out = 1;
+static unsigned int foreground_in, foreground_out;
 static int refresh_status;
 
 
@@ -87,6 +87,8 @@ static void sigcont_handler(int sig)
 		/* Only call if it was not already prepared */
 		set_tty();
 	}
+#else
+	foreground_in = foregound_out = 1;
 #endif
 
 	if (sig != 0)
@@ -439,6 +441,8 @@ int main(int argc, char **argv)
 
 #ifdef SIGTSTP
 				sigcont_handler(0);
+#else
+				foreground_in = foregound_out = 1;
 #endif
 				if (foreground_out && opt.verbose > 0) {
 					info_frame(&mi, &fi, &control, refresh_status);