Accept
<start of line><optional whitespace>#<anything>
as a comment in win/share/{monsters,objects,other}.txt. Existing
<start of line><optional whitespace># tile <rest of line>
is grandfathered in as data.
It wouldn't take much more to accept
<data><optional whitespace>#<rest of line>
comments too but this hasn't gone that far.
Reading the colormap at the beginning of each of the three files
used "%[A-Za-z0-i]" to read one characer into a two-character array.
Change that to "%1[A-Za-z0-9]" so that it can't overflow the buffer
if the input data gets accidentally or maliciously mangled. (Not a
security issue.)
Remove a spurious blank line from objects.txt.
Also, clean up some warnings when compiling gifread.c for gif2txt
although I ultimately didn't do anything with that.
1755d27bf8