Calling of the spinelib in the Editor

[AGulev]

Not sure if it's supposed to be like that, but I found that the editor calls the same or similar functions from the native lib a few times :

1. When a project opens, it calls SPINE_LoadFromBuffer for each file
2. When a project builds (cmd+b) it calls SPINE_LoadFromBuffer and then SPINE_UpdateVertices (sometimes it may happen in parallel, I found it because of the crash: Sometimes Editor crashes because of the spine extension  #143)

It's not critical. Crash fixed on the native side.