make parseable for splint

- replace non standard u_char with unsigned char (ANSI)
- advice splint to ignore variadic macros
- move declarations from the middle to top of functions (C90)
- replace local library includes <> to ""

mbus/mbus-tcp.c

@@ -124,7 +124,7 @@ mbus_tcp_disconnect(mbus_handle *handle)
 int
 mbus_tcp_send_frame(mbus_handle *handle, mbus_frame *frame)
 {
-    u_char buff[PACKET_BUFF_SIZE];
+    unsigned char buff[PACKET_BUFF_SIZE];
     int len, ret;
 
     if (handle == NULL || frame == NULL)