[gnome-sudoku/gnome-3-20] Really don't use C++ 11 for gnome-3-20

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 05f922ccd2096b90db558ceef72c184f008183f6
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed Jul 13 17:26:50 2016 -0500

    Really don't use C++ 11 for gnome-3-20
    
    This was a mistake.
    
    It's causing build errors for Mageia, and I have no clue why it works
    for me.

 lib/qqwing-wrapper.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/lib/qqwing-wrapper.cpp b/lib/qqwing-wrapper.cpp
index d0eb059..1976114 100644
--- a/lib/qqwing-wrapper.cpp
+++ b/lib/qqwing-wrapper.cpp
@@ -47,7 +47,7 @@ int* qqwing_generate_puzzle(int difficulty)
     g_mutex_lock(&mutex);
     if (!seeded)
     {
-        srand(time(nullptr));
+        srand(time(NULL));
         seeded = true;
     }
     g_mutex_unlock(&mutex);