#3662: Fix segfault introduced when fixing memory leaks.

TESTED=./python -E -tt ./Lib/test/regrtest.py test_fileio
R (approach from bug)=Amaury and Benjamin

Lib/test/test_fileio.py

@@ -227,6 +227,10 @@ class OtherFileTests(unittest.TestCase):
             except:
                 pass
 
+    def testInvalidInit(self):
+        self.assertRaises(TypeError, _fileio._FileIO, "1", 0, 0)
+
+
 def test_main():
     # Historically, these tests have been sloppy about removing TESTFN.
     # So get rid of it no matter what.

Modules/_fileio.c

@@ -175,7 +175,7 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
 						 kwlist,
 						 Py_FileSystemDefaultEncoding,
 						 &name, &mode, &closefd))
-			goto error;
+			return -1;
 	    }
 	}