Enhancement: Error handling when trying to manualmap a dll that does not have a dllmain with the CallEntry switch set to true

[jfmaes]

when you try to invoke a method in a manually mapped dll with the CallEntry switch to true, that does not have a main method, the program crashes without a clear error handling in place.

[TheWover]

Will add error handling that checks whether there is an entry point when the CallEntry switch is set to true. If so, it will attempt to fail silently. (Not throw an exception because if the user cares that much about knowing whether there is an entry point then they can just check themselves before loading the module with CallEntry = True.)