Add json_array_foreach() #define, parallelling json_object_foreach()

src/jansson.h

@@ -148,6 +148,11 @@ int json_object_iter_set_new(json_t *object, void *iter, json_t *value);
         key && (value = json_object_iter_value(json_object_key_to_iter(key))); \
         key = json_object_iter_key(json_object_iter_next(object, json_object_key_to_iter(key))))
 
+#define json_array_foreach(array, index, value) \
+	for(index = 0; \
+		index < json_array_size(array) && (value = json_array_get(array, index)); \
+		index++)
+
 static JSON_INLINE
 int json_object_set(json_t *object, const char *key, json_t *value)
 {