amend small typing error

theano/gpuarray/pool_ave_grad.c

@@ -53,7 +53,7 @@ KERNEL void ave_pool3d_grad_kernel(const ga_size nthreads,
    const ga_size num, const ga_size channels, const ga_size depth,
    const ga_size height, const ga_size width, const ga_size pooled_depth,
    const ga_size pooled_height, const ga_size pooled_width,
-   GLOBAL_MEM const DTYPE_INPUT_0 *x, GLOBAL_MEM const DTYPE_OUTPUT_1 *gz,
+   GLOBAL_MEM const DTYPE_INPUT_0 *x, GLOBAL_MEM const DTYPE_INPUT_1 *gz,
    const ga_size kernel_d, const ga_size kernel_h, const ga_size kernel_w,
    const ga_size stride_d, const ga_size stride_h, const ga_size stride_w,
    const ga_size pad_d, const ga_size pad_h, const ga_size pad_w,