-Wextra and unsigned template parameters

[Aliesha Finkel <agfinkel at yahoo dot com>]

Hi, I'm using -Wextra (-W) to compile my code, one
feature of which is throwing a warning when an
unsigned type is checked for >= 0 since it's always
true.  In general I find this to be very helpful, but
it throws this error even for templated types.  A code
example is included below.  Does anyone know how best
to supress this warning without resorting to removing
the condition or turning off -Wextra?  Thank you in
advance.

template <typename T>
struct foo {    
  foo(T bar) { if (bar >= 0) bar = 1; }
};

If foo<signed type> is instantiated elsewhere then
this check could still be useful.

I apologize in advance if this question is better
suited to gcc-help.  I tried there, and not having
gotten an answer I fear it may be a defect in -Wextra
so I took it up here.

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com