[patch] replace reinterpret_cast with static_cast in tests

["Jonathan Wakely" <jwakely dot gcc at gmail dot com>]

No need to use reinterpret_cast in these tests, static_cast is enough.
 The copies of these tests under 20_util already use static_cast.

Texted x86-64/linux - OK for mainline?

        * testsuite/tr1/2_general_utilities/shared_ptr/thread/
        default_weaktoshared.cc: Use static_cast not reinterpret_cast.
        * testsuite/tr1/2_general_utilities/shared_ptr/thread/
        mutex_weaktoshared.cc: Likewise.

Index: testsuite/tr1/2_general_utilities/shared_ptr/thread/default_weaktoshared.cc
===================================================================
--- testsuite/tr1/2_general_utilities/shared_ptr/thread/default_weaktoshared.cc	(revision 131157)
+++ testsuite/tr1/2_general_utilities/shared_ptr/thread/default_weaktoshared.cc	(working copy)
@@ -82,7 +82,7 @@
 
 void* thread_hammer_and_kill(void* opaque_pools)
 {
-  shared_and_weak_pools& pools = *reinterpret_cast<shared_and_weak_pools*>(opaque_pools);
+  shared_and_weak_pools& pools = *static_cast<shared_and_weak_pools*>(opaque_pools);
   // Using the same parameters as in the RNG test cases.
   std::tr1::mersenne_twister<
     unsigned long, 32, 624, 397, 31,
@@ -117,7 +117,7 @@
 
 void* thread_hammer(void* opaque_weak)
 {
-  wp_vector_t& weak_pool = *reinterpret_cast<wp_vector_t*>(opaque_weak);
+  wp_vector_t& weak_pool = *static_cast<wp_vector_t*>(opaque_weak);
   // Using the same parameters as in the RNG test cases.
   std::tr1::mersenne_twister<
     unsigned long, 32, 624, 397, 31,
@@ -165,11 +165,11 @@
   pthread_attr_init(&tattr);
 
   shared_and_weak_pools pools(obj_pool, weak_pool[0]);
-  pthread_create(threads, &tattr, thread_hammer_and_kill, reinterpret_cast<void*>(&pools));
+  pthread_create(threads, &tattr, thread_hammer_and_kill, static_cast<void*>(&pools));
   for (unsigned int worker = 1; worker < HAMMER_MAX_THREADS; worker++)
     {
       if (pthread_create(&threads[worker], &tattr,
-			 thread_hammer, reinterpret_cast<void*>(&weak_pool[worker])))
+			 thread_hammer, static_cast<void*>(&weak_pool[worker])))
 	std::abort();
     }
   // Wait for threads to complete, then check integrity of reference.
Index: testsuite/tr1/2_general_utilities/shared_ptr/thread/mutex_weaktoshared.cc
===================================================================
--- testsuite/tr1/2_general_utilities/shared_ptr/thread/mutex_weaktoshared.cc	(revision 131157)
+++ testsuite/tr1/2_general_utilities/shared_ptr/thread/mutex_weaktoshared.cc	(working copy)
@@ -84,7 +84,7 @@
 
 void* thread_hammer_and_kill(void* opaque_pools)
 {
-  shared_and_weak_pools& pools = *reinterpret_cast<shared_and_weak_pools*>(opaque_pools);
+  shared_and_weak_pools& pools = *static_cast<shared_and_weak_pools*>(opaque_pools);
   // Using the same parameters as in the RNG test cases.
   std::tr1::mersenne_twister<
     unsigned long, 32, 624, 397, 31,
@@ -119,7 +119,7 @@
 
 void* thread_hammer(void* opaque_weak)
 {
-  wp_vector_t& weak_pool = *reinterpret_cast<wp_vector_t*>(opaque_weak);
+  wp_vector_t& weak_pool = *static_cast<wp_vector_t*>(opaque_weak);
   // Using the same parameters as in the RNG test cases.
   std::tr1::mersenne_twister<
     unsigned long, 32, 624, 397, 31,
@@ -167,11 +167,11 @@
   pthread_attr_init(&tattr);
 
   shared_and_weak_pools pools(obj_pool, weak_pool[0]);
-  pthread_create(threads, &tattr, thread_hammer_and_kill, reinterpret_cast<void*>(&pools));
+  pthread_create(threads, &tattr, thread_hammer_and_kill, static_cast<void*>(&pools));
   for (unsigned int worker = 1; worker < HAMMER_MAX_THREADS; worker++)
     {
       if (pthread_create(&threads[worker], &tattr,
-			 thread_hammer, reinterpret_cast<void*>(&weak_pool[worker])))
+			 thread_hammer, static_cast<void*>(&weak_pool[worker])))
 	std::abort();
     }
   // Wait for threads to complete, then check integrity of reference.