Simplify COPY_TWO_BYTES macro and fix -Wstrict-aliasing warning.
Simplify COPY_TWO_BYTES macro and fix -Wstrict-aliasing warning.

* subversion/libsvn_subr/string.c
  (COPY_TWO_BYTES): implement as memcpy

Suggested by: philip

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1345883 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion