SDL_cpuinfo.c (OS2): undefine HAVE_SYSCTLBYNAME
diff --git a/src/cpuinfo/SDL_cpuinfo.c b/src/cpuinfo/SDL_cpuinfo.c
index f9e9509..a088696 100644
--- a/src/cpuinfo/SDL_cpuinfo.c
+++ b/src/cpuinfo/SDL_cpuinfo.c
@@ -28,6 +28,7 @@
#include "../core/windows/SDL_windows.h"
#endif
#if defined(__OS2__)
+#undef HAVE_SYSCTLBYNAME
#define INCL_DOS
#include <os2.h>
#ifndef QSV_NUMPROCESSORS