Fix #if-#elif-#endif structure.
Fix #if-#elif-#endif structure.

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