Check serial.available() before trying to readHEADmaster

The Maple API returns an unsigned char from read(), making
the old check for -1 incorrect.

1 files changed, 2 insertions, 5 deletions

diff --git a/Midi.cpp b/Midi.cpp
index 2b95eed..b5655de 100644
--- a/Midi.cpp
+++ b/Midi.cpp
@@ -225,13 +225,10 @@ void Midi::recvByte(int byte)
 // Try to read data at serial port & pass anything read to processing function
 void Midi::poll(void)
 {
-    int c;
-    
-    
     // Just keep sucking data from serial port until it runs out, processing
     //  MIDI messages as we go
-    while((c = serial_.read()) != -1) {
-        recvByte(c);
+    while(serial_.available() > 0) {
+        recvByte(serial_.read());
     }
 }