More fixes after SdrMetricItem changes

...like e0c2ea6bde31bd68e1794154b72fddcd40dda7f9 "Consistency around
SdrMetricItem in svx/sderitm.hxx," similar to recent
c3a9a9542b018f781ee12e6c8c943d4f19641afe "that's not right anyway, using the
Distance as a which-id."

Should all be found and fixed now with the removal of the unnecessary but
harmful default value from the two-argument SdrMetricItem ctor.

Change-Id: I6eaeb6633c9a350b18e02d476d2c8794a733cea8