Avoid some unnecessary traversal in "ForwardDeclareTypes".
Avoid some unnecessary traversal in "ForwardDeclareTypes".

scoder/cython,scoder/cython,da-woods/cython,da-woods/cython,cython/cython,cython/cython,scoder/cython,da-woods/cython,cython/cython,da-woods/cython,cython/cython,scoder/cython