Merge pull request #1537 from deltachat/fix_dc_str_constants

Add missing DC_STR_* constants to deltachat.h

deltachat-ffi/deltachat.h

@@ -4423,7 +4423,11 @@ void dc_event_unref(dc_event_t* event);
 #define DC_STR_LOCATION                   66
 #define DC_STR_STICKER                    67
 #define DC_STR_DEVICE_MESSAGES            68
-#define DC_STR_COUNT                      68
+#define DC_STR_SAVED_MESSAGES             69
+#define DC_STR_DEVICE_MESSAGES_HINT       70
+#define DC_STR_WELCOME_MESSAGE            71
+#define DC_STR_UNKNOWN_SENDER_FOR_CHAT    72
+#define DC_STR_COUNT                      72
 
 /*
  * @}