Keeping this would be inconsistent with the other documentation

I also added a couple trivial, but related, suggestions.

closes #460

Fix json_object_object_foreach to avoid uninitialized variable warnings
using ANSI C or MSC.

In VS 2015, the warning text is "warning C4550: expression evaluates to a function which is missing an argument list".

Because doing `json_tokener_parse(json_object_get_string(src))`
feels sloppy, dirty, and makes me want to cry at night
sometimes.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

Issue #338, add json_object_add_int functions

Windows: Fix dynamic library build with Visual Studio

Also correct a couple of calls to _to_json_string to check the return value.

This new method allows to also
get the length of the generated string.

Fix #165

Change-Id: Iea91404027f143ca3d29a4c58d7c07ae53556110
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

To better distinguish between entry->k and entry->v being const within linkhash, but non-const outside, add lh_entry_v() and lh_entry_k() accessors.
Make lh_entry->k const.

Include stddef.h in json_object.h

Also, json_object_set_serializer is changed to respect the userdata
and user_delete parameters when to_string_func is NULL.

It is needed for size_t.

Add utility function for comparing json_objects