fix wrongly disallowed rx of max possible size

TinyFrame.c

@@ -549,7 +549,7 @@ void _TF_FN TF_AcceptChar(TinyFrame *tf, unsigned char c)
 
                 CKSUM_RESET(tf->cksum); // Start collecting the payload
 
-                if (tf->len >= TF_MAX_PAYLOAD_RX) {
+                if (tf->len > TF_MAX_PAYLOAD_RX) {
                     // ERROR - frame too long. Consume, but do not store.
                     tf->discard_data = true;
                 }

TinyFrame.h

@@ -10,7 +10,7 @@
  * Upstream URL: https://github.com/MightyPork/TinyFrame
  */
 
-#define TF_VERSION "2.0.3"
+#define TF_VERSION "2.0.4"
 
 //---------------------------------------------------------------------------
 #include <stdint.h>  // for uint8_t etc