Different compilers, different strokes.

It's defined in a header file this does not include
diff --git a/src/cbor.c b/src/cbor.c
index 73546d6..b38a336 100644
--- a/src/cbor.c
+++ b/src/cbor.c
@@ -185,7 +185,7 @@
 }
 
 
-byte RgbDontUse4[8 * 1024];
+unsigned char RgbDontUse4[8 * 1024];
 
 size_t cn_cbor_encode_size(cn_cbor * object)
 {