A follow-up to r18042 (replacing the overzealous r18059).
A follow-up to r18042 (replacing the overzealous r18059).

* subversion/libsvn_ra_dav/session.c
  Include ctype.h for tolower().

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion