Fixed compile error for the UC3 architecture when INTERRUPT_CONTROL_ENDPOINT...

Fixed compile error for the UC3 architecture when INTERRUPT_CONTROL_ENDPOINT is specified (thanks to Andrus Aaslaid).

LUFA/DoxygenPages/ChangeLog.txt

@@ -23,6 +23,7 @@
   *  - Core:
   *   - Fixed possible enumeration error if the user application selects a pipe other than the default Control pipe between the Powered and Default states of
   *     the host state machine
+  *   - Fixed compile error for the UC3 architecture when INTERRUPT_CONTROL_ENDPOINT is specified (thanks to Andrus Aaslaid)
   *  - Library Applications:
   *   - None
   *

LUFA/Drivers/USB/Core/UC3/USBInterrupt_UC3.h

@@ -357,6 +357,8 @@
 				 *  using the user application's preferred USB controller driver.
 				 */
 				void USB_GEN_vect(void);
+			#else
+				ISR(USB_GEN_vect);
 			#endif
 
 	/* Disable C linkage for C++ Compilers: */