Ignore Werror-maybe-uninitialized from Azure IoT Library

Ignore the error about a potentially uninitialized variable
in the Azure library that will occur when compiling as a component
in ESP-IDF.

Author: sieren

CMakeLists.txt

@@ -138,6 +138,11 @@ set(AZURE_SRCS
   libraries/AzureIoT/src/Esp32MQTTClient.cpp
   )
 
+set_source_files_properties(libraries/AzureIoT/src/az_iot/iothub_client/src/iothubtransport_mqtt_common.c
+    PROPERTIES COMPILE_FLAGS
+    -Wno-maybe-uninitialized
+)
+
 set(BLE_SRCS
   libraries/BLE/src/BLE2902.cpp
   libraries/BLE/src/BLE2904.cpp