ruby/missing.h: M_PI fallback definition

* include/ruby/missing.h (M_PI, M_PI_2): fallback definitions for
  VC6.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51313 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/complex.c b/complex.c
index 50d53afcde..beaf6713a1 100644
--- a/complex.c
+++ b/complex.c
@@ -5,12 +5,12 @@
   which is written in ruby.
 */
 
-#include "internal.h"
 #if defined _MSC_VER
 /* Microsoft Visual C does not define M_PI and others by default */
 # define _USE_MATH_DEFINES 1
 #endif
 #include <math.h>
+#include "internal.h"
 
 #define NDEBUG
 #include <assert.h>