[tex-k] [pdftex] Incomplete error message of \pdfstrcmp

[Karl Berry]

    \pdfstrcmp{}{ %
    \endinput
    ... patch in
    https://gist.github.com/aminophen/906fe5795d3b00e3ea2bd76d9cb2dde0

    FWIW, XeTeX also has a problem, posted at
    https://sourceforge.net/p/xetex/bugs/144/.

Thanks much, applied for pdftex. -k