[Bug analyzer/126858] -Wanalyzer-use-of-uninitialized-value false positive with printf's %n

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126858

--- Comment #3 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
This one is actually specific to printf:

int printf (const char *, ...);
int f (void)
{
  int n;
  printf ("%n", &n);
  return n;
}

gives the warning, but if I change "printf" to "t" (i.e. just change the
function name), the warning disappears.

So this is a 3rd reason why it is different from PR126859.