remove code commited by mistake. The communicate() fct call is doing the wait already.
Fix crash introduced in gh-1207 with theano variable that don't have the broadcastable attribute like sparse and random variable.
Disable the // convolution by default, as it slow thing down by default in some cases.
Added comment to code.
Merge pull request #1214 from nouiz/infer_shape_broadcast_fix

Infer shape broadcast fix