[Bug libstdc++/48114] [C++0x] binomial_distribution incorrect for p > .5 and geometric_distribution wrongly implements the TR1 definition

[aaz at althenia dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48114

--- Comment #12 from Andrey Zholos <aaz at althenia dot net> 2011-03-14 
18:07:22 UTC ---
The  double __p  also fixes an infinite (maybe) loop in both
binomial_distribution(100, .75) and binomial_distribution(100, .25)
when _GLIBCXX_USE_C99_MATH_TR1 is defined.

I guess the proper way to test the algorithms is to generate a lot of
values and do a Pearson's chi-square test to check that the distribution
is correct. Then that can be used to make a faster testcase for just a
few values.