Wire: move TX and RX buffer index and length to uint16_t

Prepare introduction of max TX buffer length

Signed-off-by: Alexandre Bourdiol <[email protected]>

Author: ABOSTM

Diff for: libraries/Wire/src/Wire.h

@@ -36,14 +36,14 @@ extern "C" {
 class TwoWire : public Stream {
   private:
     uint8_t *rxBuffer;
-    uint8_t rxBufferAllocated;
-    uint8_t rxBufferIndex;
-    uint8_t rxBufferLength;
+    uint16_t rxBufferAllocated;
+    uint16_t rxBufferIndex;
+    uint16_t rxBufferLength;
 
     uint8_t txAddress;
     uint8_t *txBuffer;
-    uint8_t txBufferAllocated;
-    uint8_t txDataSize;
+    uint16_t txBufferAllocated;
+    uint16_t txDataSize;
 
     uint8_t transmitting;