[devel] Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard

around the call to png_flush() after png_write_IEND().  See 1.4.0beta32,
1.4.0beta50 changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41
CHANGES in the libpng_master branch.  Someone needs this feature but
I don't remember who.
3 files changed