undef for tha case missing.h defines it as macro

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52843 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2015-12-02 00:03:51 +00:00 · 2015-12-02 00:03:51 +00:00 · bb5bd52a59
--- a/missing/explicit_bzero.c
+++ b/missing/explicit_bzero.c
@ -23,6 +23,7 @@
 # define FUNC_UNOPTIMIZED(x) x
 #endif

+#undef explicit_bzero
 #ifndef HAVE_EXPLICIT_BZERO
 #ifdef HAVE_MEMSET_S
 void