Fix session compatibility check for post modules

Author: wvu

lib/msf/core/post.rb

@@ -29,9 +29,13 @@ class Failed < RuntimeError
 
   def setup
     m = replicant
+
     if m.actions.length > 0 && !m.action
       raise Msf::MissingActionError, "Please use: #{m.actions.collect {|e| e.name} * ", "}"
     end
+
+    # PostMixin
+    super
   end
 
   def type

lib/msf/core/post_mixin.rb

@@ -39,8 +39,6 @@ def setup
       print_warning('SESSION may not be compatible with this module.')
     end
 
-    super
-
     check_for_session_readiness() if session.type == "meterpreter"
 
     @session.init_ui(self.user_input, self.user_output)