Remove some unused variables, and fix a bogus 'might be used uninitialized' warning that GCC isn't clever enough to figure out by itself.
Remove some unused variables, and fix a bogus 'might be used
uninitialized' warning that GCC isn't clever enough to figure out
by itself.

Followup to r18363.

* subversion/libsvn_delta/svndiff.c
  (window_handler): Remove unused variables 'lastoffset' and 'bits'.
  (zlib_decode): Remove unused variable 'origlen'.
  (decode_window): Remove essentially unused variables 'saved_inslen'
    and 'saved_newlen'.  Initialise and assign into 'new_data' earlier,
    allowing us to move 'instout' and 'ndout' into the svndiff1-specific
    scope, also avoiding a bogus 'may be used uninitialized' warning.

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