fixing NavigationMesh.FindPath using parameter-ref in binding-call

[dertom95]

NavigationMesh.FindPath did not find any results. The start and endpoint were valid points on the navmesh.
I added some logs in the glue.cpp-layer and could see that the start- and end-values (vector3) were not the expected values.
Changing the glue-code function-signature to use vector3 parameters with ref keyword did the trick. Not sure why, but after that the right values were passed down to the cpp-layer.

[elix22]

Good catch .
It make sense , the underlying native function expects two Vector3 by reference
https://github.com/elix22/Urho3D/blob/dotnet/Source/Urho3D/DotNet/glue.cpp#L304

Not sure who implemented it , it wasn't me :)
In addition there is a memory leak on the native side , this one is never freed
https://github.com/elix22/Urho3D/blob/dotnet/Source/Urho3D/DotNet/glue.cpp#L312

[elix22]

I fixed the memory leak , will be part of the upcoming binaries , with additional fixes

4b5f08c