[tex-live] shell_escape extension patch

[Akira Kakuto]

Hi Jonathan,

> Sorry if I'm being slow this morning, but in looking at this code,  
> I'm puzzled why there's a need to set (and then free)  
> fullnameoffile .... I don't see what it's used for.

When makefullnamestring()

strnumber
makefullnamestring()
{
  return maketexstring(fullnameoffile);
}

is called, assertion fails in maketexstring if
fullnameoffile == NULL, whereas maketexstring in
pdftex allows NULL.

An easy way out is to set fullnameoffile,
though it is not the full-path but the command
name in this case ( to see the command name is not bad ).

Best,
Akira