json: fix fall through warnings

modules/misc/webservices/json.c

@@ -178,6 +178,7 @@ static int new_value
 
 #define whitespace \
    case '\n': ++ cur_line;  cur_line_begin = i; \
+   /* fall through */ \
    case ' ': case '\t': case '\r'
 
 #define string_add(b)  \
@@ -554,6 +555,7 @@ json_value * json_parse_ex (json_settings * settings, const json_char * json, ch
                         break;
                      }
 
+                     /* fall through */
                   default:
 
                      sprintf (error, "%d:%d: Unexpected `%c` in object", cur_line, e_off, b);