Use shared_ptr<T>::element_type in hash specializations

	* include/bits/shared_ptr.h (hash<shared_ptr<T>>): Use element_type.
	* include/bits/shared_ptr_base.h (hash<__shared_ptr<T, L>>): Likewise.

From-SVN: r242333

libstdc++-v3/ChangeLog

+2016-11-11  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/shared_ptr.h (hash<shared_ptr<T>>): Use element_type.
+	* include/bits/shared_ptr_base.h (hash<__shared_ptr<T, L>>): Likewise.
+
 2016-11-10  François Dumont  <fdumont@gcc.gnu.org>
 
 	* src/c++11/debug.cc (format_word): Delete.

libstdc++-v3/include/bits/shared_ptr.h

@@ -692,7 +692,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
       size_t
       operator()(const shared_ptr<_Tp>& __s) const noexcept
-      { return std::hash<_Tp*>()(__s.get()); }
+      {
+	return std::hash<typename shared_ptr<_Tp>::element_type*>()(__s.get());
+      }
     };
 
   // @} group pointer_abstractions

libstdc++-v3/include/bits/shared_ptr_base.h

@@ -1681,7 +1681,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
       size_t
       operator()(const __shared_ptr<_Tp, _Lp>& __s) const noexcept
-      { return std::hash<_Tp*>()(__s.get()); }
+      {
+	return hash<typename __shared_ptr<_Tp, _Lp>::element_type*>()(
+	    __s.get());
+      }
     };
 
 _GLIBCXX_END_NAMESPACE_VERSION