Fixed #2870: cmathmodule.c compile error

Misc/NEWS

@@ -34,6 +34,8 @@ Extension Modules
 
 - bsddb module updated to version 4.6.4.
 
+- Fixed #2870: cmathmodule.c compile error
+
 Library
 -------
 

Modules/cmathmodule.c

@@ -920,7 +920,7 @@ cmath_phase(PyObject *self, PyObject *args)
 	errno = 0;
 	PyFPE_START_PROTECT("arg function", return 0)
 	phi = c_atan2(z);
-	PyFPE_END_PROTECT(r)
+	PyFPE_END_PROTECT(z)
 	if (errno != 0)
 		return math_error();
 	else