Correctly set output_size when hidden_cell=None #112

Job	Run time
static	1m 2s
static	1m 2s
test (test, gpu, tensorflow[and-cuda], self-hosted, gpu)	4m 25s
test (test, gpu, tensorflow[and-cuda], self-hosted, gpu)	4m 25s
test (test, 3.11, latest)	2m 22s
test (test, 3.11, latest)	2m 52s
test (test, tensorflow~=2.6.0, 3.8, oldest)	2m 7s
test (test, tensorflow~=2.6.0, 3.8, oldest)	2m 14s
test (test, tensorflow~=2.9.0, tf-2.9)	2m 27s
test (test, tensorflow~=2.9.0, tf-2.9)	2m 27s
test (test, tensorflow~=2.13.0, tf-2.13)	2m 18s
test (test, tensorflow~=2.13.0, tf-2.13)	2m 18s
test (docs, tensorflow[and-cuda]==2.16.1, 3.9, self-hosted, gpu)	3m 30s
test (docs, tensorflow[and-cuda]==2.16.1, 3.9, self-hosted, gpu)	3m 30s
test (examples, tensorflow[and-cuda]==2.16.1, self-hosted, gpu)	3m 35s
test (examples, tensorflow[and-cuda]==2.16.1, self-hosted, gpu)	3m 35s
coverage	23s
coverage	25s
deploy	0s
deploy	0s
	44m 57s

Provide feedback