The alternate hack is now removed, although it did not have any effect
anyway since it was #ifdef-ed out. outvalue also no longer strips leading
$ characters from channel names (invalue still does, however).

Note that your magic number is too large for the resolution of 32 bit
floats, and may get rounded to a different value if MYFLT is float.
Thus, the host must do the check as 'if (value == (MYFLT) -987654321)'
(hopefully the rounding error in the host will match that of CsoundLib),
while for example 'if (value == -987654321.0)' would possibly not work
correctly.

Also, the :: separator requires making a copy of the channel name (you
should not modify it in-place, and it is const char*) to extract the
actual channel name, and for an older host every string value will appear
as a separate new channel.

However, as I already stated, I am fine with keeping your implementation
(its functionality is already restored, with some minor fixes and style
changes), particularly given that I do not use invalue/outvalue frequently
anyway.


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