bpo-32703: Fix coroutine resource warning in case where there's an error

Author: 1st1

Misc/NEWS.d/next/Core and Builtins/2018-01-29-01-15-17.bpo-32703.mwrF4-.rst

@@ -0,0 +1,2 @@
+Fix coroutine's ResourceWarning when there's an active error set when it's
+being finalized.

Objects/genobject.c

@@ -76,9 +76,7 @@ _PyGen_Finalize(PyObject *self)
     if (gen->gi_code != NULL &&
         ((PyCodeObject *)gen->gi_code)->co_flags & CO_COROUTINE &&
         gen->gi_frame->f_lasti == -1) {
-        if (!error_value) {
-            _PyErr_WarnUnawaitedCoroutine((PyObject *)gen);
-        }
+        _PyErr_WarnUnawaitedCoroutine((PyObject *)gen);
     }
     else {
         res = gen_close(gen, NULL);