John Bowler 0ecbe53243 pngimage: correct #define checking
In libpng 1.7 pngimage needs to check PNG_WRITE_PNG_SUPPORTED (new in 1.7), not
PNG_WRITE_SUPPORTED because png_write_png can be disabled without disabling
PNG_WRITE_SUPPORTED.  Copied the approach from 1.6 pngcp.c (so this still works
in 1.6 as well.)
2016-07-02 07:37:37 -07:00
..
2016-07-02 07:37:37 -07:00