[Bug c/60296] Confusing -Wformat warning on invalid format string

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60296

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
For the % conversion there are no modifiers defined, so gcc stops before the
second %, parsing the rest as %*d, which requires two arguments.