* fix missing declarations for HM400

tools/esp8266/hmSystem.h

@@ -145,6 +145,10 @@ class HmSystem {
                 p->listLen = (uint8_t)(HM1200_LIST_LEN);
                 p->assign  = (byteAssign_t*)hm1200assignment;
             }
+            else if(INV_TYPE_HM400 == p->type) {
+                p->listLen = (uint8_t)(HM400_LIST_LEN);
+                p->assign  = (byteAssign_t*)hm400assignment;
+            }
             else {
                 p->listLen = 0;
                 p->assign  = NULL;