PR libstdc++/53984 fix failing test

	PR libstdc++/53984
	* testsuite/27_io/basic_fstream/53984.cc: Fix test.

From-SVN: r250594

libstdc++-v3/ChangeLog

+2017-07-26  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/27_io/basic_fstream/53984.cc: Fix test.
+
 2017-07-26  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* testsuite/27_io/basic_fstream/53984.cc: Fix typo in dg-require

libstdc++-v3/testsuite/27_io/basic_fstream/53984.cc

@@ -23,10 +23,13 @@
 void
 test01()
 {
-  std::fstream in(".");
-  int x;
-  in >> x;
-  VERIFY( in.bad() );
+  std::ifstream in(".");
+  if (in)
+  {
+    int x;
+    in >> x;
+    VERIFY( in.bad() );
+  }
 }
 
 int