FORMATATTR

Message        <Context> the arguments to <function name> do not
               match the assertions of its format attribute.  The
               format argument or the argument preceeding the first
               argument to check is missing.

Description    The format attribute of this function asserts that
               the format argument exists and will be checked if it
               is a string constant.  The first argument to check,
               if non-zero, identifies the argument corresponding to
               the ellipsis in the function declaration and asserts
               that the argument preceeding it exists.

User Action    Modify either the function call or the format
               attribute so that they match.