Add detection for ODBC WCHAR fields
Without detecting these types, cel_odbc blows up when the character
set for the table is utf8. This also wraps cdr_adaptive_odbc's use of
those types in the HAVE_ODBC_WCHAR #ifdef seen in other parts of the
code.
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Merged revisions 358435 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 358436 from http://svn.asterisk.org/svn/asterisk/branches/10
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@358437
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