Normalize the given AfDalDecimal objet.
This function return a SQL compliant numeric string. Its main purpose is to get the standard value to be sent to af-servers. Normalize process is done by using actual separator configuration.
This function will return a normalized value to 0.0 if a null AfDalDecimal value is received.
See afdal_decimal_set_decimal_separator in order to be able to change it.
|decimal ||a value to normilize|
- a newly allocated string with decimal normilized value or NULL if fail.