lgamma_r.c: fix at -0.0

* math.c (ruby_lgamma_r): missing/lgamma_r.c is used on Windows,
  since msvcrt does not provide it.
* missing/lgamma_r.c (lgamma_r): fix lgamma(-0.0).
  [ruby-core:74823] [Bug #12249]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54496 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/math.c b/math.c
index 23c6210373..8c16c76c3b 100644
--- a/math.c
+++ b/math.c
@@ -750,7 +750,7 @@ ruby_tgamma(const double d)
 #define tgamma(d) ruby_tgamma(d)
 #endif
 
-#if defined _WIN32 || defined __APPLE__
+#if defined __APPLE__
 static inline double
 ruby_lgamma_r(const double d, int *sign)
 {