update Cpp::GetVariableOffset according to API changes to handle multiple inheritance

Author: Vipul-Cariappa

clingwrapper/src/clingwrapper.cxx

@@ -1710,9 +1710,9 @@ std::string Cppyy::GetTypeAsString(TCppType_t type)
     return Cpp::GetTypeAsString(type);
 }
 
-intptr_t Cppyy::GetDatamemberOffset(TCppScope_t var)
+intptr_t Cppyy::GetDatamemberOffset(TCppScope_t var, TCppScope_t klass)
 {
-  return Cpp::GetVariableOffset(Cpp::GetUnderlyingScope(var));
+  return Cpp::GetVariableOffset(Cpp::GetUnderlyingScope(var), klass);
 }
 
 // static inline

clingwrapper/src/cpp_cppyy.h

@@ -349,7 +349,7 @@ namespace Cppyy {
     RPY_EXPORTED
     std::string GetTypeAsString(TCppType_t type);
     RPY_EXPORTED
-    intptr_t    GetDatamemberOffset(TCppScope_t var);
+    intptr_t    GetDatamemberOffset(TCppScope_t var, TCppScope_t klass = nullptr);
     RPY_EXPORTED
     bool CheckDatamember(TCppScope_t scope, const std::string& name);