Fix some external declarations and disable PNG saving
authorH.G.Muller <hgm@hgm-xboard.(none)>
Sun, 26 Feb 2023 12:37:45 +0000 (13:37 +0100)
committerH.G.Muller <hgm@hgm-xboard.(none)>
Sun, 26 Feb 2023 12:37:45 +0000 (13:37 +0100)
commit10271cfda48d67b46afd4b66ce17a4cb45115d02
treecf120c39c88cf6012a94e37007d2da8132eff979
parent4c0f8b8257f57cedd5f50c1d4884129f1eff9927
Fix some external declarations and disable PNG saving

A private hack that was never intended for inclusion, to create PNG image
files of the SVG pieces, had krept into the source. Two header files
failed to declare a common global as 'extern', and newer C compilers
did not like teh resulting double declaration.
backend.h
draw.c
evalgraph.h