New gcc warns about strings/json_lib.c

/mariadb/10.2-ext/strings/json_lib.c:1450:58: warning: ?: using integer constants in boolean context, the expression will always evaluate to ‘true’ [-Wint-in-bool-context]
if (state->paths[p_c].steps[state->cur_depth].type &
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(je->state == JST_OBJ_START) ? JSON_PATH_KEY : JSON_PATH_ARRAY)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~_^~~~~~~~~~~~~~~~
/mariadb/10.2-ext/strings/json_lib.c: In function ‘json_path_setup’:
/mariadb/10.2-ext/strings/json_lib.c:1141:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
state= PS_KEY;
~~~~_^~~~~~~
/mariadb/10.2-ext/strings/json_lib.c:1148:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
double_wildcard= JSON_PATH_KEY_NULL;
~~~~~~~~~~~~~~_^~~~~~~~~~~~~~~~~~~
/mariadb/10.2-ext/strings/json_lib.c:1155:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
state= PS_AR;
~~~~_^~~~~~
/mariadb/10.2-ext/strings/json_lib.c: In function ‘json_get_path_next’:
/mariadb/10.2-ext/strings/json_lib.c:1704:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (je->s.error)
^
```