GCC3.4.2 selects incorrect function overload when an ellipsis overload is available

["Lee-Thorp, Andrew" <ALee-Thorp at ndsuk dot com>]

GCC 3.4.2 selects an 'unavailable' function overload.
Platform is Cygwin on Windows 2000.

See the example below.

class A {};
class B : public A {};
class C : private A {};

void f(...);
void f(A*);
void error()
{
  f(static_cast<B*>(0));
  f(static_cast<C*>(0)); // <- Line 42
}

Conversion.cc: In function `void error()':
Conversion.cc:42: error: `A' is an inaccessible base of `C'
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