Wrong result from dyadic ¨ with empty argument

[Ben Harris]

Thank you for GNU APL!  I think I've found a bug in SVN revision 1286.

Applying the dyadic ¨ ('each') operator where one or both arguments is an 
empty array results in a scalar rather than an empty array as the result:

      (0⍴0)+¨1
0
      (0⍴0)+¨(0⍴0)
0
      1+¨(0⍴0)
0
      ⍴((0⍴0)+¨(0⍴0))

      ⍴⍴((0⍴0)+¨(0⍴0))
0

Both ISO/IEC 13751 and the IBM APL2 Reference seem to me to say that the 
shape of the result should be the shape of the non-scalar argument, so the 
first three expressions above should all return 0⍴0 rather than 0.

--
Ben Harris