Csound~ readbuf won't read in correct number of channels

[vlazzarini]

If I load a buffer into an ftable with a readbuf message, it will copy the correct length, but it will not copy the correct amount of channels (it is typically defaulting to 1 channel, even when loading a stereo file). Also, it seems like performance with loscil is inconsistent- sometimes tables loaded in with readbuf will work, and sometimes they won't.
Here is a link that includes an example maxpatch, csd, and some samples:
https://www.dropbox.com/s/v6pd0601a7rxwa6/Readbuf%20Bug.zip?dl=0

I am using csound~ 1.1.3, Max 7.0.4, and OSX 10.10.3

From csound/csound#496