When making the previous change (rev 13300 Nov 21 2007) rdm forgot to increment

the TEnv version number. This patch fixes the report:
 <http://savannah.cern.ch/bugs/?37270>


git-svn-id: http://root.cern.ch/svn/root/trunk@24087 27541ba8-7e3a-0410-8455-c3a389f83636

core/base/inc/TEnv.h

@@ -163,7 +163,7 @@ public:
    virtual void        PrintEnv(EEnvLevel level = kEnvAll) const;
    Bool_t              IgnoreDuplicates(Bool_t ignore);
 
-   ClassDef(TEnv,1)  // Handle ROOT configuration resources
+   ClassDef(TEnv,2)  // Handle ROOT configuration resources
 };
 
 R__EXTERN TEnv *gEnv;