fixed small errors

src/layers/recurrent.jl

@@ -211,14 +211,14 @@ end
 
 @layer RNN
 
-initialstates(rnn::RNN) = zeros_like(x, size(rnn.cell.Wh, 1))
+initialstates(rnn::RNN) = zeros_like(rnn.cell.Wh, size(rnn.cell.Wh, 1))
 
 function RNN((in, out)::Pair, σ = tanh; cell_kwargs...)
   cell = RNNCell(in => out, σ; cell_kwargs...)
   return RNN(cell)
 end
 
-function (m::RNN)(x::AbstractArray)
+function (rnn::RNN)(x::AbstractArray)
   state = initialstates(rnn)
   return rnn(x, state)
 end
@@ -410,7 +410,7 @@ end
 @layer LSTM
 
 function initialstates(lstm::LSTM)
-  state = zeros_like(x, size(lstm.cell.Wh, 2))
+  state = zeros_like(lstm.cell.Wh, size(lstm.cell.Wh, 2))
   cstate = zeros_like(state)
   return state, cstate
 end
@@ -590,7 +590,7 @@ end
 
 @layer GRU
 
-initialstates(gru::GRU) = zeros_like(x, size(gru.cell.Wh, 2))
+initialstates(gru::GRU) = zeros_like(gru.cell.Wh, size(gru.cell.Wh, 2))
 
 function GRU((in, out)::Pair; cell_kwargs...)
   cell = GRUCell(in => out; cell_kwargs...)
@@ -737,7 +737,7 @@ end
 
 @layer GRUv3
 
-initialstates(gru::GRUv3) = zeros_like(x, size(gru.cell.Wh, 2))
+initialstates(gru::GRUv3) = zeros_like(gru.cell.Wh, size(gru.cell.Wh, 2))
 
 function GRUv3((in, out)::Pair; cell_kwargs...)
   cell = GRUv3Cell(in => out; cell_kwargs...)