ISSUE #3 Minor fix on createMeshNode
ISSUE #3 Minor fix on createMeshNode

use sizeof(vertices[0]) instead of repo_vector_t, so if we change the
representation in the future it won't break (as easy)!

3drepo/3drepobouncer,3drepo/3drepobouncer,3drepo/3drepobouncer,3drepo/3drepobouncer