Merge branch 'develop' of https://github.com/nicolargo/glances into develop

glances/core/glances_standalone.py

@@ -57,9 +57,12 @@ class GlancesStandalone(object):
             # Ignore kernel threads in process list
             glances_processes.disable_kernel_threads()
 
-        if args.process_tree:
-            # Enable process tree view
-            glances_processes.enable_tree()
+        try:
+            if args.process_tree:
+                # Enable process tree view
+                glances_processes.enable_tree()
+        except AttributeError:
+            pass
 
         # Initial system informations update
         self.stats.update()