[CVS ci] trace output change

[Leopold Toetsch]

I've rearranged the output of parrot -t a bit. It should be more 
readable now e.g.:

     0 set P16, P1      - P16=NULL, P1=NULL
     3 set P17, P5      - P17=SArray=PMC(0x40304908), 
P5=SArray=PMC(0x40304908)
     6 set I16, P17     - , P17=SArray=PMC(0x40304908)
     9 newsub P16, 46, 5715     - P16=Sub=PMC(0x403048f0), ,
    13 set I0, 1
    16 set I1, 0
    19 set I2, 0
    22 set I3, 0
    25 set I4, 0
    28 set P0, P16      - P0=Sub=PMC(0x403048f0), P16=Sub=PMC(0x403048f0)
    31 savetop
    32 invokecc

The trace_op() function is now called *after* the instruction was 
executed, so LHS effects like that of C<new> are immediately visible.

Have fun,
leo