Moar PR libstdc++/80506

2018-05-07  Edward Smith-Rowland  <3dw4rd@verizon.net>

	Moar PR libstdc++/80506
	* include/bits/random.tcc (gamma_distribution::__generate_impl()):
	Fix magic number used in loop condition.

From-SVN: r260004

libstdc++-v3/ChangeLog

+2018-05-07  Edward Smith-Rowland  <3dw4rd@verizon.net>
+
+	Moar PR libstdc++/80506
+	* include/bits/random.tcc (gamma_distribution::__generate_impl()):
+	Fix magic number used in loop condition.
+
 2018-05-04  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/85642 fix is_nothrow_default_constructible<optional<T>>