* libexslt/crypto.c, libexslt/functions.c, libxslt/keys.c,
  libxslt/numbers.c, libxslt/pattern.c, libxslt/transform.c,
  libxslt/variables.c: changed some variable names for warning
  cleanup when -ansi flag is not present.
* libxslt/namespaces.c: fixed potential NULL pointer reference
  pointed out by Dennis Dams (bug 156187)