src: fix some static analysis warnings

lib/Figments/Input.h

@@ -130,7 +130,7 @@ private:
     void init();
 #ifdef CONFIG_THREADED_INPUTS
     static void readThread(void* data);
-    MainLoop* m_threadLoop;
+    MainLoop* m_threadLoop = nullptr;
     static uint8_t m_threadBuf[sizeof(InputEvent) * 32];
     QueueHandle_t m_queue;
     StaticQueue_t m_threadQueue;