Pass in session to CWD check

Oops, used to this being accessible universally. Not the case here.

lib/msf/core/exploit/file_dropper.rb

@@ -201,7 +201,7 @@ module Exploit::FileDropper
   # @param [String] dir The directory to delete
   # @return [Boolean] True if the delete command has been executed in the remote machine, otherwise false.
   def file_dropper_delete_dir(session, dir)
-    if file_dropper_check_cwd?(dir)
+    if file_dropper_check_cwd?(session, dir)
       print_warning("Attempting to delete working directory #{dir}")
     end
 
@@ -258,7 +258,7 @@ module Exploit::FileDropper
   #
   # @param [String] path The path to check
   # @return [Boolean] true if the path is the same, otherwise false
-  def file_dropper_check_cwd?(path)
+  def file_dropper_check_cwd?(session, path)
     if session.type == 'meterpreter'
       return true if path == session.fs.dir.pwd
     else