zero and pointer conversions in g++

[Thomas Braxton]

I have this test code that I think g++ is selecting the wrong function when 
the second argument is a zero. If compiled with HAVE_ASCII_DEFAULT 1 it 
selects read(const char*, const char*) instead of read(const char*, const 
Variant&), for test2a/test3a. If compiled with HAVE_ASCII_DEFAULT 0 
compilation fails  because test2a/test3a are ambiguous. Shouldn't all of the 
tests select the Variant function, or am I missing something? Why do I have 
to explicitly create a Variant when the argument is zero?

Tested w/ g++ 3.4.3 (Mandrakelinux 10.2 3.4.3-7mdk) and 4.0.1 (self compiled)

TIA,
Thomas

PS please CC as I'm not subscribed
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