added wrapping fix for timer

examples/parsing/parsing.pde

@@ -94,7 +94,7 @@ void useInterrupt(boolean v) {
   }
 }
 
-uint16_t timer = millis();
+uint32_t timer = millis();
 void loop()                     // run over and over again
 {
   // in case you are not using the interrupt above, you'll
@@ -120,6 +120,9 @@ void loop()                     // run over and over again
       return;  // we can fail to parse a sentence in which case we should just wait for another
   }
 
+  // if millis() or timer wraps around, we'll just reset it
+  if (timer > millis())  timer = millis();
+
   // approximately every 2 seconds or so, print out the current stats
   if (millis() - timer > 2000) { 
     timer = millis(); // reset the timer