CI_GET_*_INFO_*: add do ... while (0) to avoid -Wextra-semi-stmt warnings

Clears 24 warnings from clang of the form:

TextExt16.c:63:34: warning: empty expression statement has no effect;
 remove unnecessary ';' to silence this warning [-Wextra-semi-stmt]
        CI_GET_DEFAULT_INFO_1D (fs, def);
                                        ^

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <xorg/lib/libx11!272>