Use PY_FLAVOR for dependencies.

FLAVOR is the current port's flavor, it should not be used outside of
this scope.

Sponsored by:	Absolight

math/py-patsy/Makefile

@@ -16,7 +16,7 @@ LICENSE_COMB=	multi
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 RUN_DEPENDS=	${PYNUMPY} \
-		${PYTHON_PKGNAMEPREFIX}six>=0:devel/py-six@${FLAVOR}
+		${PYTHON_PKGNAMEPREFIX}six>=0:devel/py-six@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	autoplist concurrent distutils