Added PUGIXML_VERSION define to enable preprocessor-based version checks in...

Added PUGIXML_VERSION define to enable preprocessor-based version checks in case compatibility workarounds are needed

git-svn-id: http://pugixml.googlecode.com/svn/trunk@827 99668b35-9821-0410-8761-19e4c4f06640

src/pugixml.hpp

@@ -14,6 +14,10 @@
 #ifndef HEADER_PUGIXML_HPP
 #define HEADER_PUGIXML_HPP
 
+// Define version macro; evaluates to major * 100 + minor so that it's safe to use in less-than comparisons
+#define PUGIXML_VERSION 100
+
+// Include user configuration file (this can define various configuration macros)
 #include "pugiconfig.hpp"
 
 // Include stddef.h for size_t and ptrdiff_t