#27 Compilation fails when OS does not provide strndup

[Ryan Carsten Schmidt]

Compilation of dia2code 0.8.8 fails on Mac OS X 10.6 (and presumably earlier) with:

Undefined symbols:
  "_strndup", referenced from:
      _find_diaoid in dia2code-dia2code.o
      _sourceblock_new in dia2code-source_parser.o
      _source_parse in dia2code-source_parser.o
      _source_preserve in dia2code-source_parser.o
ld: symbol(s) not found

strndup was not in OS X until version 10.7. Could you add a compatibility implementation of strndup, or avoid using strndup?

[Oliver Kellogg]

I coded a strndup() emulation; could you try out the git master?
Thanks.