Fix JSON_INTEGER overflow on Windows by changing datatype to 'long long'

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/json.c b/json.c
index cba370a..7480a61 100644
--- a/json.c
+++ b/json.c
@@ -35,7 +35,7 @@
 	return pair;
 }
 
-static struct json_value *json_create_value_int(long number)
+static struct json_value *json_create_value_int(long long number)
 {
 	struct json_value *value = malloc(sizeof(struct json_value));
 
@@ -212,7 +212,7 @@
 	if (type == JSON_TYPE_STRING)
 		value = json_create_value_string(va_arg(args, char *));
 	else if (type == JSON_TYPE_INTEGER)
-		value = json_create_value_int(va_arg(args, long));
+		value = json_create_value_int(va_arg(args, long long));
 	else if (type == JSON_TYPE_FLOAT)
 		value = json_create_value_float(va_arg(args, double));
 	else if (type == JSON_TYPE_OBJECT)
@@ -248,7 +248,7 @@
 	if (type == JSON_TYPE_STRING)
 		value = json_create_value_string(va_arg(args, char *));
 	else if (type == JSON_TYPE_INTEGER)
-		value = json_create_value_int(va_arg(args, long));
+		value = json_create_value_int(va_arg(args, long long));
 	else if (type == JSON_TYPE_FLOAT)
 		value = json_create_value_float(va_arg(args, double));
 	else if (type == JSON_TYPE_OBJECT)
@@ -350,7 +350,7 @@
 		log_info("\"%s\"", value->string);
 		break;
 	case JSON_TYPE_INTEGER:
-		log_info("%ld", value->integer_number);
+		log_info("%lld", value->integer_number);
 		break;
 	case JSON_TYPE_FLOAT:
 		log_info("%.2f", value->float_number);