iconv_close - deallocate descriptor for character set conversion
int iconv_close(iconv_t cd);
The iconv_close() function deallocates a conversion descriptor cd
previously allocated using iconv_open(3).
When successful, the iconv_close() function returns 0. In case of error,
it sets errno and returns -1.
This function is available in glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, SUSv2.
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