Miscellaneous warnings on Windows

[Paul J. Lucas]

First warning:

include\zorba\transcode_stream.h(275) : warning C4355: 'this' : used in base member initializer list

Second warning:

src\runtime\json\jsonml_array.cpp(201) : warning C4800: 'zorba::whitespace::type' : forcing value to bool 'true' or 'false' (performance warning)

[Paul J. Lucas (paul-lucas)]

For the first warning, the code is actually correct as-is. The warning is ONLY a warning. Hence, in this case, the warning should be disabled.

[Paul J. Lucas (paul-lucas)]

The second warning can be suppressed by using !! hidden inside a macro.

[Paul J. Lucas (paul-lucas)]

Rolled into this bug is also a build error on Windows in locale.cpp. The fix is to use () rather than =.