[Gdal-dev] patch for mingw bug in strdup

[Rob McMullen]

Using MinGW, there's a really strange bug that I can't yet isolate
completely, but occurs within msvcrt's strdup implementation.
Enclosed is a patch to duplicate the functionality of strdup but using
VSIMalloc, avoiding the problematic strdup.

If you didn't want to use this to replace strdup entirely, you could
wrap the new code with ifdefs:

#if defined(WIN32) && defined(__GCC__)

which should isolate this to MinGW only.

Rob
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