Fix display error with repeated characters (ncurses/xterm related issue)

Fix display error with repeated characters (ncurses/xterm related issue)

On recent OSes such as RHEL 8.0, ncurses(6.1) introduced support
for ECMA-48 repeat character control.
Some terminal emulators use TERM=xterm but do not support this feature.
In this case, printing repeated character such as "22000000 Hz" might
be displayed as 220 Hz.
Other emulators, such as tmux, use TERM=screen, and do not exhibit the issue.

Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>
Change-Id: I79977c7421699b59957d6cbd8aa954f06f3e0227