[Bug-apl] fractional power ¯8⋆÷3

[Xiao-Yong Jin]

Hi,

With the svn version 719,

      8 ¯8⋆÷3
2 0.000000000

but with the release version 1.5,

      8 ¯8⋆÷3
2 1J1.732050808

Best,
Xiao-Yong