X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d5e84db5ab84d05d135d2522a419db65a4491628..334f70aa80ecfa05a42c6006cb49d14f05555fa8:/LUFA/Drivers/USB/Class/Host/PrinterClassHost.h?ds=inline

diff --git a/LUFA/Drivers/USB/Class/Host/PrinterClassHost.h b/LUFA/Drivers/USB/Class/Host/PrinterClassHost.h
index 9a7cb0845..792f86564 100644
--- a/LUFA/Drivers/USB/Class/Host/PrinterClassHost.h
+++ b/LUFA/Drivers/USB/Class/Host/PrinterClassHost.h
@@ -231,7 +231,7 @@
 			 *
 			 *  \return Total number of buffered bytes received from the device.
 			 */
-			uint16_t PRNT_Host_BytesReceived(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceInfo);
+			uint16_t PRNT_Host_BytesReceived(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function
 			 *  returns a negative value. The \ref PRNT_Host_BytesReceived() function may be queried in advance to determine how many bytes
@@ -244,7 +244,7 @@
 			 *
 			 *  \return Next received byte from the device, or a negative value if no data received.
 			 */
-			int16_t PRNT_Host_ReceiveByte(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceInfo);
+			int16_t PRNT_Host_ReceiveByte(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 
 			/** Retrieves the attached printer device's ID string, formatted according to IEEE 1284. This string is sent as a
 			 *  Unicode string from the device and is automatically converted to an ASCII encoded C string by this function, thus