Fix corner-case expm1(-0) == -0.  Found by Matthew Brett.


git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@6594 4407c894-4637-0410-b4f5-ada5f102cad1

mingw-w64-crt/math/expm1.def.h

diff --git a/mingw-w64-crt/math/expm1.def.h b/mingw-w64-crt/math/expm1.def.h
index 476f1b9..9346031 100644
--- a/mingw-w64-crt/math/expm1.def.h
+++ b/mingw-w64-crt/math/expm1.def.h
@@ -60,7 +60,7 @@
   }
   else if (x_class == FP_ZERO)
   {
-    return __FLT_CST(0.0);
+    return x;
   }
   if (__FLT_ABI (fabs) (x) < __FLT_LOGE2)
     {