from wine repo cbe42036231a07d11f0ef6ba374d01aefa9b6a2c :
include math.h in d3dvec.inl as it uses sqrt().

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/branches/releases/v1.0@4196 4407c894-4637-0410-b4f5-ada5f102cad1

mingw-w64-headers/direct-x/include/d3dvec.inl

diff --git a/mingw-w64-headers/direct-x/include/d3dvec.inl b/mingw-w64-headers/direct-x/include/d3dvec.inl
index 9418dd2..96f669b 100644
--- a/mingw-w64-headers/direct-x/include/d3dvec.inl
+++ b/mingw-w64-headers/direct-x/include/d3dvec.inl
@@ -19,6 +19,8 @@
 #ifndef __WINE_D3DVEC_INL
 #define __WINE_D3DVEC_INL
 
+#include <math.h>
+
 /*** constructors ***/
 
 inline _D3DVECTOR::_D3DVECTOR(D3DVALUE f)