CLI: Use printf return to compute string size instead of hardcoded values

cli/main.c

@@ -81,19 +81,19 @@ static void signal_handler(int signum)
 
 static void display_password(char* password, int time)
 {
-    int length;
+    int print_len = 0;
 
     for (; time && !s_stop_display; time--)
     {
-        printf("\r(%02d) Password found: %s", time, password);
+        print_len = printf("\r(%02d) Password found: %s", time, password);
         fflush(stdout);
         sleep(1);
     }
 
     // Clear line
+    print_len++; // For C or Z
     printf("\r");
-    length = 4 + 17 + strlen(password) + 1 + 1 /* For Ctrl+Z/C */;
-    while (length--)
+    while (print_len--)
         printf(" ");
     printf("\n");
 }