Null pointer check on create.c openInfo free #300

What steps will reproduce the problem?
1. Usage of Dokan with JNA-based Java bindings project JDokan

What is the expected output? What do you see instead?
Expect for DispatchCreate to have a non-null 'PDOKAN_OPEN_INFO openInfo' 
argument.
Instead, pointer was null and can lead to system instability.

What version of the product are you using? On what operating system?
Using version 0.6 on various Windows platforms.

Please provide any additional information below.
Suggest create.c, ln. 216: if(openInfo) free(openInfo)