[v3] -Wall fixes

[Paolo Carlini]

Hi,

fix two minor regressions for the -Wall testsuite. Committed to mainline.

Paolo.

////////////////

2011-11-08  Paolo Carlini  <paolo.carl...@oracle.com>

        * testsuite/29_atomics/headers/atomic/macros.cc: Avoid -Wall
        warnings.
        * testsuite/29_atomics/atomic/cons/user_pod.cc: Likewise.

Index: testsuite/29_atomics/headers/atomic/macros.cc
===================================================================
--- testsuite/29_atomics/headers/atomic/macros.cc       (revision 181153)
+++ testsuite/29_atomics/headers/atomic/macros.cc       (working copy)
@@ -63,7 +63,7 @@
 
 extern void abort(void);
 
-main ()
+int main ()
 {
  if (ATOMIC_CHAR_LOCK_FREE != 0 && ATOMIC_CHAR_LOCK_FREE != 1
      && ATOMIC_CHAR_LOCK_FREE != 2)
Index: testsuite/29_atomics/atomic/cons/user_pod.cc
===================================================================
--- testsuite/29_atomics/atomic/cons/user_pod.cc        (revision 181153)
+++ testsuite/29_atomics/atomic/cons/user_pod.cc        (working copy)
@@ -29,7 +29,7 @@
 void atomics()
 {
   std::atomic<dwordp> a;
-  bool b = a.is_lock_free();
+  bool b __attribute__((unused)) = a.is_lock_free();
 }
 
 int main()