1) try spec-cleaner package to rid of few formatting issues
2) the %build section should be conditional in better way:
make -C src %{?_smp_mflags} prefix=%{_prefix} \
%if 0%{?suse_version} >= 1310
UNINORM=1 \
%endif
UCS=1
Rest looks quite acceptable so thanks for all the work.

superseded by 259699