[json] Fix missed integer callback for zero

Summary:

Test Plan:

lib/stdlib/src/json.erl

@@ -828,9 +828,11 @@ number_zero(<<$., Rest/bits>>, Original, Skip, Acc, Stack, Decode, Len) ->
 number_zero(<<E, Rest/bits>>, Original, Skip, Acc, Stack, Decode, Len) when E =:= $E; E =:= $e ->
     number_exp_copy(Rest, Original, Skip, Acc, Stack, Decode, Len + 1, <<"0">>);
 number_zero(<<>>, Original, Skip, Acc, Stack, Decode, Len) ->
-    unexpected(Original, Skip, Acc, Stack, Decode, Len, 0, {number, 0});
+    Value = (Decode#decode.integer)(<<"0">>),
+    unexpected(Original, Skip, Acc, Stack, Decode, Len, 0, {number, Value});
 number_zero(Rest, Original, Skip, Acc, Stack, Decode, Len) ->
-    continue(Rest, Original, Skip+Len, Acc, Stack, Decode, 0).
+    Value = (Decode#decode.integer)(<<"0">>),
+    continue(Rest, Original, Skip+Len, Acc, Stack, Decode, Value).
 
 number(<<Num, Rest/bits>>, Original, Skip, Acc, Stack, Decode, Len) when ?is_0_to_9(Num) ->
     number(Rest, Original, Skip, Acc, Stack, Decode, Len + 1);

lib/stdlib/test/json_SUITE.erl

@@ -482,10 +482,10 @@ test_decode_api(_Config) ->
         null => nil
     },
 
-    Data = <<"{\"a\": [[], {}, true, false, null, {\"foo\": \"baz\"}], \"b\": [1, 2.0, \"three\"]}">>,
+    Data = <<"{\"a\": [[], {}, true, false, null, {\"foo\": \"baz\"}], \"b\": [1, 2.0, \"three\", 0]}">>,
     {Decoded, Acc, <<>>} = json:decode(Data, {[], 0}, Decoders),
-    ?assertEqual({[], 24}, Acc),
-    Expected = #{a => [[], #{}, true, false, nil, #{foo => baz}], b => [1, 2.0, three]},
+    ?assertEqual({[], 25}, Acc),
+    Expected = #{a => [[], #{}, true, false, nil, #{foo => baz}], b => [1, 2.0, three, 0]},
     ?assertEqual(Expected, Decoded),
     ExpectedHistory =
         [
@@ -523,13 +523,15 @@ test_decode_api(_Config) ->
             {array_push, {2.0, {[1], 19}}, {[2.0, 1], 20}},
             {string, <<"three">>, three},
             {array_push, {three, {[2.0, 1], 20}}, {[three, 2.0, 1], 21}},
-            {array_finish, {{[three, 2.0, 1], 21}, {[{a, [[], #{}, true, false, nil, #{foo => baz}]}], 17}},
-                {[1, 2.0, three], {[{a, [[], #{}, true, false, nil, #{foo => baz}]}], 22}}},
-            {object_push, {b, [1, 2.0, three], {[{a, [[], #{}, true, false, nil, #{foo => baz}]}], 22}}, {
-                [{b, [1, 2.0, three]}, {a, [[], #{}, true, false, nil, #{foo => baz}]}], 23
+            {integer, <<"0">>, 0},
+            {array_push, {0, {[three, 2.0, 1], 21}}, {[0, three, 2.0, 1], 22}},
+            {array_finish, {{[0, three, 2.0, 1], 22}, {[{a, [[], #{}, true, false, nil, #{foo => baz}]}], 17}},
+                {[1, 2.0, three, 0], {[{a, [[], #{}, true, false, nil, #{foo => baz}]}], 23}}},
+            {object_push, {b, [1, 2.0, three, 0], {[{a, [[], #{}, true, false, nil, #{foo => baz}]}], 23}}, {
+                [{b, [1, 2.0, three, 0]}, {a, [[], #{}, true, false, nil, #{foo => baz}]}], 24
             }},
-            {object_finish, {{[{b, [1, 2.0, three]}, {a, [[], #{}, true, false, nil, #{foo => baz}]}], 23}, {[], 0}},
-                {#{a => [[], #{}, true, false, nil, #{foo => baz}], b => [1, 2.0, three]}, {[], 24}}}
+            {object_finish, {{[{b, [1, 2.0, three, 0]}, {a, [[], #{}, true, false, nil, #{foo => baz}]}], 24}, {[], 0}},
+                {#{a => [[], #{}, true, false, nil, #{foo => baz}], b => [1, 2.0, three, 0]}, {[], 25}}}
         ],
     ?assertEqual(ExpectedHistory, lists:reverse(get(history))).