Fix launch_vm_process EnvironmentChange type error

Author: iondex

README.rst

@@ -46,7 +46,9 @@ Launching a Machine
 
     >>> session = virtualbox.Session()
     >>> machine = vbox.find_machine("windows")
-    >>> progress = machine.launch_vm_process(session, "gui", "")
+    >>> # progress = machine.launch_vm_process(session, "gui", "")
+    >>> # For virtualbox API 6_1 and above (VirtualBox 6.1.2+), use the following:
+    >>> progress = machine.launch_vm_process(session, "gui", [])
     >>> progress.wait_for_completion()
 
 Querying the Machine

virtualbox/library.py

@@ -12795,8 +12795,8 @@ def launch_vm_process(self, session, name, environment):
             raise TypeError("session can only be an instance of type ISession")
         if not isinstance(name, basestring):
             raise TypeError("name can only be an instance of type basestring")
-        if not isinstance(environment, basestring):
-            raise TypeError("environment can only be an instance of type basestring")
+        if not (isinstance(environment, basestring) or isinstance(environment, list)):
+            raise TypeError("environment can only be an instance of type basestring or list")
         progress = self._call("launchVMProcess",
                      in_p=[session, name, environment])
         progress = IProgress(progress)