Fixed crash when changing display modes (#237)

sgminer.c

@@ -4886,8 +4886,9 @@ static void display_options(void)
 
   opt_loginput = true;
   immedok(logwin, true);
-  clear_logwin();
+
 retry:
+  clear_logwin();
   wlogprint("[N]ormal [C]lear [S]ilent mode (disable all output)\n");
   wlogprint("[D]ebug: %s\n[P]er-device: %s\n[Q]uiet: %s\n[V]erbose: %s\n"
       "[R]PC debug: %s\n[W]orkTime details: %s\n[I]ncognito: %s\n"