BADVASTART

Message        <Context> old-style parameter "<name>", with type
               that requires default argument promotion, cannot be
               used with va_start.

Description    It is invalid for the parameter specified in va_start
               to be one that requires default argument promotion.

User Action    The recommended fix is to recode the function
               definition to use a prototype-format definition.  It
               is also possible to change the parameter declaration
               to use one of the default types, for example double.