[pushed] libstdc++: add missing return

[Jason Merrill]

Tested x86_64-pc-linux-gnu, applying to trunk as obvious.

-- 8< --

The return seems to have been lost in the r15-1858 RAII overhaul.

libstdc++-v3/ChangeLog:

        * include/bits/stl_uninitialized.h (__uninitialized_move_copy): Add
        missing return.
---
 libstdc++-v3/include/bits/stl_uninitialized.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libstdc++-v3/include/bits/stl_uninitialized.h 
b/libstdc++-v3/include/bits/stl_uninitialized.h
index a9965f26269..f663057b1a1 100644
--- a/libstdc++-v3/include/bits/stl_uninitialized.h
+++ b/libstdc++-v3/include/bits/stl_uninitialized.h
@@ -540,6 +540,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __result = __mid; // Everything up to __mid is now guarded.
       __result = std::__uninitialized_copy_a(__first2, __last2, __mid, 
__alloc);
       __guard.release();
+      return __result;
     }
 
   // __uninitialized_fill_move

base-commit: 7b500fa34ad88d5fdd4bf74eb2737b214749075b
-- 
2.46.0