[bug] offset when using widechar input

[LESdylan]

What happened

if the user write something normal but with other characters like ñ for instance that are not from table ascii AND if the prompt is enough logn to cover all the width of the window tab of the terminal.. we get an overlap of character due to the size of the character..

Command / script:

This is working because there is only ASCII character

fasfsafasfsdcsyugcyuwgegfgsgcsuycgywggfwucyussgacyuwugfuyewucuyweguagyfayugwucygguwcgy

This doesn't work well because it has ñ at the begining

ñfklsjafksajdflsajfskdjcosajofjosdjfoasfjasjfoisjoafjjsdfdijsdfoijisfsdfoaso

hellish output / exit status:

# before
ñfklsjafksajdflsajfskdjcosajofjosdjfoasfjasjfoisjoafjjsdfdijsdfoijisfsdfoaso
# let's add hello after o
hellojafksajdflsajfskdjcosajofjosdjfoasfjasjfoisjoafjjsdfdijsdfoijisfsdfoaso