Fix WIN32-MingW build

Author: moninom1

FreeRTOS/Demo/WIN32-MingW/Makefile

@@ -96,6 +96,7 @@ FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/comtest.c, $(FREERT
 FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/flash_timer.c, $(FREERTOS_DEMOS_SOURCES))
 FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/flash.c, $(FREERTOS_DEMOS_SOURCES))
 FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/IntQueue.c, $(FREERTOS_DEMOS_SOURCES))
+FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/MessageBufferAMP.c, $(FREERTOS_DEMOS_SOURCES))
 FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/recmutex.c, $(FREERTOS_DEMOS_SOURCES))
 FREERTOS_DEMOS_SOURCES += ./DemosModifiedForLowTickRate/recmutex.c
 FREERTOS_DEMOS_SOURCES := $(filter-out $(FREERTOS_DEMOS_DIR)/sp_flop.c, $(FREERTOS_DEMOS_SOURCES))