Clinton Ingram

Howdy @maxst, Thanks for maintaining this patch. I've been using the other APNG patch for a while, but it hasn't been updated in a few versions, and I thought I'd give this one a try. I'm getting build errors, however. This patch does not update the ordinals for DLL exports in png.h correctly since the addition of png_get_eXIf_1 and png_set_eXIf_1, resulting in a mismatch with the ordinals defined in symbols.def (which was updated). Specifically, the PNG_EXPORT lines from 401 to 464 in the patch...