memcpy of all the lines

src/chat.c

@@ -15,11 +15,12 @@ _chat chat;
 int
 chat_findfreeline ()
 {
-	 int i;
+    int i;
 	i = chat.lastline;
+
     if (i >= CHAT_MAX_LINES) {
-        memcpy (chat.lines[1], chat.lines[0], 255);
+        memcpy (chat.lines[1], chat.lines[0], 255 * (CHAT_MAX_LINES - 1));
-        i = 255;
+        i = CHAT_MAX_LINES - 1;
     }
     else
         chat.lastline++;