[committed] libstdc++: Fix typo in piecewise_constant_distribution::param_type constructor.

[Tomasz Kamiński]

Fixed typo in r17-509-g7bed7d9276c11b: The __fw should be called with
__xmin + 0.5 * __delta (as in existing loop), not __xmin * 0.5 * __delta.

libstdc++-v3/ChangeLog:

	* include/bits/random.tcc
	(piecewise_constant_distribution:::param_type::param_type):
	Replace * with + in __fw argument.
---
 libstdc++-v3/include/bits/random.tcc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/include/bits/random.tcc b/libstdc++-v3/include/bits/random.tcc
index e581f912764..a8fab79961d 100644
--- a/libstdc++-v3/include/bits/random.tcc
+++ b/libstdc++-v3/include/bits/random.tcc
@@ -3084,7 +3084,7 @@ namespace __detail
 	if (__n == 1)
 	  {
 	    _RealType __ints[2] = { __xmin, __xmin + __delta };
-	    _RealType __den = __fw(__xmin * 0.5 * __delta);
+	    _RealType __den = __fw(__xmin + 0.5 * __delta);
 	    _M_initialize2(__ints, __den);
 	    return;
 	  }
-- 
2.54.0