tree efea733ffeb61ea7f6a3652b6ad48acd8a372719
parent 8c542ad9dfc3e7f8a8c790343a43d9cffbc54fd8
author Cosmin Truta <ctruta@gmail.com> 1663134897 +0300
committer Cosmin Truta <ctruta@gmail.com> 1663134897 +0300

Delete vestigial declarations formerly used on 16-bit platforms

Delete the structure members used in the 16-bit Turbo C memory models.
Delete the PNG_ABORT declaration used in the 16-bit Windows build.

Stop checking macros (e.g. _WINDOWS) predefined by 16-bit Windows
compilers (but do check the __NT__ macro, which was the only one
predefined by ancient Windows NT compilers).