Don't compile AdvancedPayloadParser if not requested.

Sming/Libraries/OtaUpgradeMqtt/component.mk

@@ -1,14 +1,16 @@
-COMPONENT_SRCDIRS := src/
-COMPONENT_INCDIRS := src/include
+COMPONENT_SRCDIRS  := 
+COMPONENT_SRCFILES := src/PayloadParser.cpp src/RbootPayloadParser.cpp 
+COMPONENT_INCDIRS  := src/include
 
 # If enabled (set to 1) then we can use all sofisticated mechanisms to upgrade the firmware using the ``OtaUpgrade`` library.
 COMPONENT_VARS := ENABLE_OTA_ADVANCED
 ENABLE_OTA_ADVANCED ?= 0
 
+ifneq ($(ENABLE_OTA_ADVANCED),0)
+	COMPONENT_SRCFILES += src/AdvancedPayloadParser.cpp
+	COMPONENT_DEPENDS  := OtaUpgrade
+endif
+
 # If enabled (set to 1) then we can use unlimited number of patch versions
 COMPONENT_VARS += ENABLE_OTA_VARINT_VERSION 
-ENABLE_OTA_VARINT_VERSION ?= 1
-
-ifneq ($(ENABLE_OTA_ADVANCED),0)
-	COMPONENT_DEPENDS := OtaUpgrade	
-endif
+ENABLE_OTA_VARINT_VERSION ?= 1

Sming/Libraries/OtaUpgradeMqtt/samples/Upgrade/component.mk

@@ -23,7 +23,7 @@ ENABLE_CLIENT_CERTIFICATE ?= 0
 CONFIG_VARS += MQTT_URL
 ifeq ($(MQTT_URL),)
     MQTT_URL := "mqtt://test.mosquitto.org:1883"
-    ifneq ($(ENABLE_SSL),)
+    ifdef ENABLE_SSL
     	ifneq ($(ENABLE_CLIENT_CERTIFICATE),0)
     		MQTT_URL := "mqtts://test.mosquitto.org:8884"
     	else