next_usb: Stop debug print while no keyboard

diff --git a/converter/next_usb/matrix.c b/converter/next_usb/matrix.c
index d91cd25774d172a0106d1535f074f13ab5d0a2a7..524d57847603cdecc60873ede7425553696bf83b 100644 (file)
--- a/converter/next_usb/matrix.c
+++ b/converter/next_usb/matrix.c
@@ -187,7 +187,7 @@ uint8_t matrix_scan(void)
     
     uint32_t resp = (next_kbd_recv());
     
-    if (resp == NEXT_KBD_KMBUS_IDLE)
+    if (!resp || resp == NEXT_KBD_KMBUS_IDLE)
     {
         return 0;
     }