Check that wxSIZE_T_IS_* macros are always defined.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64707 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/defs.h

@@ -923,6 +923,10 @@ typedef wxUint16 wxWord;
     #error "SIZEOF_WCHAR_T must be defined, but isn't"
 #endif
 
+#if !defined(wxSIZE_T_IS_UINT) && !defined(wxSIZE_T_IS_ULONG)
+    #error "wxSIZE_T_IS_UINT or wxSIZE_T_IS_ULONG must be defined"
+#endif
+
 /* also define C99-like sized MIN/MAX constants */
 #define wxINT8_MIN CHAR_MIN
 #define wxINT8_MAX CHAR_MAX