fix test: -pow2's are technically 1 bit

Author: calad0i

test/pytest/test_auto_precision.py

@@ -261,10 +261,10 @@ def test_auto_precision_dense(keras_model_dense, data_1d, io_type, backend):
     "val, expected_width",
     [
         (0, 1),
-        (-1024, 2),
+        (-1024, 1),
         (1024, 1),
         (0.03125, 1),
-        (-0.03125, 2),
+        (-0.03125, 1),
         (1.25, 3),
         (-1.25, 4),
         (1.1, 8),