Resolves: #i123986# fix charmap accessibility for...

code points beyond the unicode baseplane

(cherry picked from commit 5a81299b05da6f1f9ec81246abe54c55f49793a4)

Conflicts:
	svx/source/accessibility/charmapacc.cxx

Change-Id: I29eaf14211be633a8dd354aac9f308e4a18ba27b
(cherry picked from commit 8fad6d99650c63dcc4a4ca4910d34dc4b901c00d)