[Bug libstdc++/51795] linear_congruential_engine doesn't work correctly

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51795

--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-01-27 
12:47:10 UTC ---
Eg:

Index: random.h
===================================================================
--- random.h    (revision 183615)
+++ random.h    (working copy)
@@ -263,7 +263,7 @@
       result_type
       operator()()
       {
-    _M_x = __detail::__mod<_UIntType, __m, __a, __c>(_M_x);
+    _M_x = (__a * _M_x + __c) % __m;
     return _M_x;
       }