perldelta for locale fixes

This is the delta for 68e8f474bc686a86c064b695b9c7400313d7af65,
and b127e37e51c21b0a36755dcd19811be931a03d83.
pp.c: Use correct size for two arrays.

The number of bytes the result of changing the case of a single UTF-8
character is given by UTF8_MAXBYTES_CASE.  In one of these arrays, space
is saved by using the proper #define; in the other there is no change
except on EBCDIC platforms.
perlrecharclass: Nits
perlapi: Add note to isASCII