Log Message:
Updated vim to 7.2.315

  1831  7.2.304  compiler warning for bad pointer cast
  2727  7.2.305  recursively redrawing causes a memory leak
  1541  7.2.306  shellescape("10%%", 1) only escapes first %
  4869  7.2.307  crash with a very long syntax match statement
  5504  7.2.308  submatch() in "\=" of ":s" command returns \ 
empty string
  1533  7.2.309  (after 7.2.308) warning for missing function prototype
  1874  7.2.310  ftdetect plugin using ":setf" doesn't work with # comment
  1408  7.2.311  can't compile with FreeMiNT
  9769  7.2.312  iconv() returns invalid char sequence when conversion fails
  3744  7.2.313  command line completion doesn't work after "%:h" and \ 
similar
  1620  7.2.314  small build broken after 7.2.313
  4605  7.2.315  Python libs can't be found on 64 bit system