#2 numeric_limits::min and macro min collision

[A. Sundman]

Changed

const log_level_t finest (std::numeric_limits<int>::min());

to

const log_level_t finest
((std::numeric_limits<int>::min)());

This works on Windows VC8. Verrify on other compilers.

[A. Sundman]

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user_id=1582185

Ok, works on gcc also and does not generate any warnings in
Xcode. Should be safe. Closing bug.