[sr-dev] JSON module compile errors

[Olle E. Johansson]

Using version 0.12 of the json-c library generates these warnings:

/O

CC (gcc) [M json.so]		json_funcs.o
json_funcs.c:64:44: warning: 'json_object_object_get' is deprecated [-Wdeprecated-declarations]
        value = (char*)json_object_to_json_string(json_object_object_get(j, field_s.s));
                                                  ^
/usr/local/include/json-c/json_object.h:290:56: note: 'json_object_object_get' has been explicitly marked deprecated here
THIS_FUNCTION_IS_DEPRECATED(extern struct json_object* json_object_object_get(struct json_object* obj,
                                                       ^
/usr/local/include/json-c/json_object.h:17:43: note: expanded from macro 'THIS_FUNCTION_IS_DEPRECATED'
#define THIS_FUNCTION_IS_DEPRECATED(func) func __attribute__ ((deprecated))
                                          ^