Very minor change to make it work in Arduino environment if it is directly included.

Author: dave

src/PrintCompat.h

@@ -14,9 +14,7 @@
  * @brief Compatibility with the Arduino Print API for mbed boards, should never be included in an Arduino build
  */
 
-#ifdef IOA_USE_ARDUINO
-# error "Print compatibility has been included on Arduino, this will cause problems, please report."
-#endif
+#ifndef IOA_USE_ARDUINO
 
 // These are definitions of the mode in which the integer print can work, either decimal, hex or binary.
 #define DEC 10
@@ -235,5 +233,6 @@ class Print {
 
 //forward definition of yield() function
 void yield();
+#endif // IOA_USE_ARDUINO
 
 #endif //IOA_PRINT_COMPAT_H