Build error for converters/libfreehand

[Paul Goyette <paul%whooppee.com@localhost>]

With up-to-date pkgsrc, and on an amd host running NetBSD 9.99.52 I am
seeing

libfreehand_utils.cpp: In function 'void libfreehand::_appendUTF16(librevenge::RVNGString&, std::vector<short unsigned int>&)':
libfreehand_utils.cpp:166:5: error: expected ';' before 'unsigned'
     unsigned char outbuf[U8_MAX_LENGTH+1];
     ^~~~~~~~
*** [libfreehand_utils.lo] Error code 1


+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost     |
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