Inconsistent zero in proportional numbers & small caps

[jessestricker]

The zero is misaligned when using both proportional numbers and small caps.

The following LaTeX code (with fontspec)

{                                                  1234567890 \scshape 1234567890} \\
{\addfontfeatures{Numbers={OldStyle             }} 1234567890 \scshape 1234567890} \\
{\addfontfeatures{Numbers={         Proportional}} 1234567890 \scshape 1234567890} \\
{\addfontfeatures{Numbers={OldStyle,Proportional}} 1234567890 \scshape 1234567890} \\

produces the following output:

You can see the misaligned zero in the third row, second column.

[kenmcd]

Also affects the Oldstyle Proportional (line 4 above).

[pauldhunt]

@jessestricker I will look into this. Thanks.