mainloop/gattlib_glib_mainloop: Fix non initialized variable

Author: oliviermartin

common/mainloop/gattlib_glib_mainloop.c

@@ -34,14 +34,18 @@ int gattlib_mainloop(void* (*task)(void* arg), void *arg) {
     GError* error;
 
     if (m_main_loop != NULL) {
-        GATTLIB_LOG(GATTLIB_ERROR, "Main loop is already running: %s", error->message);
-        g_error_free(error);
+        GATTLIB_LOG(GATTLIB_ERROR, "Main loop is already running");
         return GATTLIB_BUSY;
     }
 
     m_main_loop = g_main_loop_new(NULL, FALSE);
 
     GThread *task_thread = g_thread_try_new("gattlib_task", _execute_task, &execute_task_arg, &error);
+    if (task_thread == NULL) {
+        GATTLIB_LOG(GATTLIB_ERROR, "Could not create task for main loop: %s", error->message);
+        g_error_free(error);
+        return GATTLIB_UNEXPECTED;
+    }
 
     g_main_loop_run(m_main_loop);
     g_main_loop_unref(m_main_loop);