Some tweaks to includes for compilers without precompiled headers

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1516 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/tex2rtf/src/maths.cpp

@@ -6,14 +6,16 @@
  */
 
 // For compilers that support precompilation, includes "wx.h".
+#ifdef WX_PRECOMP
 #include "wx_prec.h"
+#endif
 
 #ifdef __BORLANDC__
 #pragma hdrstop
 #endif
 
 #ifndef WX_PRECOMP
-#include <wx.h>
+#include <wx/wx.h>
 #endif
 
 #include <ctype.h>