[gcc(refs/users/aoliva/heads/testme)] libstdc++: Fix some -Wsystem-headers warnings (PR 95765)

[Alexandre Oliva]

https://gcc.gnu.org/g:5b6215083bd6a3e10dd142e1c5d4fab011d6f074

commit 5b6215083bd6a3e10dd142e1c5d4fab011d6f074
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Jun 19 18:15:15 2020 +0100

    libstdc++: Fix some -Wsystem-headers warnings (PR 95765)
    
            PR libstdc++/95765
            * include/bits/stl_algobase.h (__size_to_integer(float))
            (__size_to_integer(double), __size_to_integer(long double))
            (__size_to_integer(__float128)): Cast return type explicitly.
            * include/bits/stl_uninitialized.h (__uninitialized_default_1<true>):
            Remove unused typedef.

Diff:
---
 libstdc++-v3/include/bits/stl_algobase.h      | 8 ++++----
 libstdc++-v3/include/bits/stl_uninitialized.h | 3 ---
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/libstdc++-v3/include/bits/stl_algobase.h b/libstdc++-v3/include/bits/stl_algobase.h
index 41dd740d34a..4fc8850d707 100644
--- a/libstdc++-v3/include/bits/stl_algobase.h
+++ b/libstdc++-v3/include/bits/stl_algobase.h
@@ -1039,14 +1039,14 @@ _GLIBCXX_END_NAMESPACE_CONTAINER
 #endif
 
   inline _GLIBCXX_CONSTEXPR long long
-  __size_to_integer(float __n) { return __n; }
+  __size_to_integer(float __n) { return (long long)__n; }
   inline _GLIBCXX_CONSTEXPR long long
-  __size_to_integer(double __n) { return __n; }
+  __size_to_integer(double __n) { return (long long)__n; }
   inline _GLIBCXX_CONSTEXPR long long
-  __size_to_integer(long double __n) { return __n; }
+  __size_to_integer(long double __n) { return (long long)__n; }
 #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128)
   inline _GLIBCXX_CONSTEXPR long long
-  __size_to_integer(__float128 __n) { return __n; }
+  __size_to_integer(__float128 __n) { return (long long)__n; }
 #endif
 
   template<typename _OutputIterator, typename _Size, typename _Tp>
diff --git a/libstdc++-v3/include/bits/stl_uninitialized.h b/libstdc++-v3/include/bits/stl_uninitialized.h
index b5248fd49ea..a3ccb72078b 100644
--- a/libstdc++-v3/include/bits/stl_uninitialized.h
+++ b/libstdc++-v3/include/bits/stl_uninitialized.h
@@ -553,9 +553,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
         static void
         __uninit_default(_ForwardIterator __first, _ForwardIterator __last)
         {
-	  typedef typename iterator_traits<_ForwardIterator>::value_type
-	    _ValueType;
-
 	  if (__first == __last)
 	    return;