A constructor of the MANTA() constructor is only default-initializing
some of the fields, while initializeRNAMap() access to all of the fields,
causing access to uninitialized variables.
For example, mResXMesh is only initialized within some conditions about
mUsingLiquid and mUsingMesh but is always used to set value in the map.
Additionally fixed re-reference of iterator which equals to end(): the
iterator in such case does not contain value and it should not be accessed.
Pull Request: https://projects.blender.org/blender/blender/pulls/144502
3c4e48e8ca