Define _USE_MATH_DEFINES for Visual Studio (thanks @pionere!) Fixes https://github.com/libsdl-org/SDL/issues/3790
diff --git a/include/SDL_stdinc.h b/include/SDL_stdinc.h
index c60d6ee..06233c0 100644
--- a/include/SDL_stdinc.h
+++ b/include/SDL_stdinc.h
@@ -80,9 +80,9 @@
# include <ctype.h>
#endif
#ifdef HAVE_MATH_H
-# if defined(__WINRT__)
+# if defined(_MSC_VER)
/* Defining _USE_MATH_DEFINES is required to get M_PI to be defined on
- WinRT. See http://msdn.microsoft.com/en-us/library/4hwaceh6.aspx
+ Visual Studio. See http://msdn.microsoft.com/en-us/library/4hwaceh6.aspx
for more information.
*/
# define _USE_MATH_DEFINES