Fix conversion from MS-ODRAW gtextSpacing to SvxCharScaleWidthItem

... i.e., from 16.16 FixedPoint with default value 0x00010000 to percentage.  At
least that is what I assume the odd code that looked like that since its
inception in f90ea7408ebbe2a2d53e94f1dc16d0e3623f59d8 "INTEGRATION: CWS sj09"
was acutally supposed to do.

Change-Id: I482fb3c1d00757b2f18c587bbb6b4a6755392d2f