Silence a justified compiler warning.
Silence a justified compiler warning.

Found by: FreeBSD gcc

* subversion/libsvn_subr/io.c
  (svn_io_detect_mimetype2): Declare PATH_EXT as a pointer to non-const char,
    and tweak casts accordingly.

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