Replace pygpu_empty with pygpu_zeros in gradients allocation inside CTC C wrapper

Signed-off-by: João Victor Tozatti Risso <joaovictor.risso@gmail.com>

Replace pygpu_empty with pygpu_zeros in gradients allocation inside CTC C wrapper
a5bf423a · João Victor Tozatti Risso · 7b762a4a · a5bf423a
--- a/theano/gpuarray/ctc_wrapper.c
+++ b/theano/gpuarray/ctc_wrapper.c
@@ -198,7 +198,7 @@ int APPLY_SPECIFIC(ctc_cost_gpu)(PyGpuArrayObject   *  in_activations,
            Py_XDECREF( *out_gradients );
            const size_t * activation_dims = PyGpuArray_DIMS( in_activations );
-            *out_gradients = pygpu_empty( 3, activation_dims, GA_FLOAT, GA_C_ORDER,
+            *out_gradients = pygpu_zeros( 3, activation_dims, GA_FLOAT, GA_C_ORDER,
                ctx, Py_None );
            if ( NULL == *out_gradients )