[CM] [Snd] 14.x build failure with ladspa, incomplete type error

[Bill Schottstaedt]

Thanks very much for the bug report!  I must have messed
up my ladpsa test.  I think the right way to fix this is to
use

    if (descriptor->connect_port) 
      descriptor->connect_port(XEN_TO_C_Ladspa_Handle(ptr),
  			     XEN_TO_C_ULONG(port),
! 			     double_to_float(mus_vct_data(samples), mus_vct_length(samples))
  			     );