There's an old hack in src/w32fns.c to avoid the user resizing an
Emacs frame below the minimum tracking size (else the user can, for
example, make a window showing only a fraction of the window caption,
which looks ugly).
However, the hack is not working. I propose fixing it with the
following straightforward patch.
Perhaps I don't understand correctly, but if this prevents users or Lisp code
from making frames smaller than the frame title, I am 100% against it.
I am probably against preventing users or Lisp code resizing a frame in _any_
way, especially in C code that cannot easily be overridden in Lisp. Please,
hands off my ugly frames ;-).