Log Message:
Update ptexenc to 1.3.2

  * ptexenc.c: Return replacement character U+FFFD
    for illegal surrogate pair in console (keyboard) input
    in upTeX on Windows.
  * ptexenc.c, ptexenc/unicode.h: Enable console (keyboard) input
    of Unicode characters in upTeX on Windows.
  * configure.ac (AH_TOP): Simplify the generation of c-auto.h.
  * ptexenc.c: Provide right console output on windows for both
    ptex and uptex if --sjis-terminal option is given. (from T. Tanaka).
  * ptexenc.c: Remove redundant lines in input_line2(), which are
    inconsistent with those lines in texmfmp.c.