[committed] libstdc++: Add missing header to unordered_set/pr115285.cc test

[Jonathan Wakely]

libstdc++-v3/ChangeLog:

        * testsuite/23_containers/unordered_set/pr115285.cc: Include
        missing header for std::vector.
---
Pushed as obvious.

 libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc 
b/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc
index 6c5cc24930c..85954aed74b 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc
@@ -2,8 +2,9 @@
 
 // libstdc++/115285
 
-#include <string>
 #include <unordered_set>
+#include <string>
+#include <vector>
 
 #include <testsuite_hooks.h>
 
-- 
2.47.0