python3_cython: fix build.
python3_cython: fix build.

haikuports/haikuports,Begasus/haikuports,koletzky/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,koletzky/haikuports,haikuports/haikuports,nielx/haikuports,moochris/haikuports,miqlas/haikuports,moochris/haikuports,Begasus/haikuports,haikuports/haikuports,miqlas/haikuports,haikuports/haikuports,Begasus/haikuports,miqlas/haikuports,nielx/haikuports,haikuports/haikuports,nielx/haikuports,koletzky/haikuports