math.h/PI integration

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30991 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/dc.cpp

@@ -54,7 +54,6 @@
 #endif
 
 #include <string.h>
-#include <math.h>
 
 #if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
     #include <commdlg.h>
@@ -94,11 +93,6 @@ static const int VIEWPORT_EXTENT = 1000;
 static const int MM_POINTS = 9;
 static const int MM_METRIC = 10;
 
-// usually this is defined in math.h
-#ifndef M_PI
-    static const double M_PI = 3.14159265358979323846;
-#endif // M_PI
-
 // ROPs which don't have standard names (see "Ternary Raster Operations" in the
 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
 #define DSTCOPY 0x00AA0029      // a.k.a. NOP operation