2020 February 29 Breaking Changes Update (#8064)

quantum/quantum.c

@@ -224,6 +224,9 @@ bool process_record_quantum(keyrecord_t *record) {
 #ifdef AUDIO_ENABLE
             process_audio(keycode, record) &&
 #endif
+#ifdef BACKLIGHT_ENABLE
+            process_backlight(keycode, record) &&
+#endif
 #ifdef STENO_ENABLE
             process_steno(keycode, record) &&
 #endif