loplugin:redundantcast: const_cast to same type

Change-Id: Ic4e5afab0e948392a0f2e4bdeab84afffa3e647f

connectivity/source/sdbcx/VGroup.cxx

@@ -108,7 +108,7 @@ Reference< XNameAccess > SAL_CALL OGroup::getUsers(  ) throw(RuntimeException, s
         // allowed
     }
 
-    return const_cast<OGroup*>(this)->m_pUsers;
+    return m_pUsers;
 }
 
 

connectivity/source/sdbcx/VIndex.cxx

@@ -163,7 +163,7 @@ Reference< ::com::sun::star::container::XNameAccess > SAL_CALL OIndex::getColumn
         OSL_FAIL( "OIndex::getColumns: caught an exception!" );
     }
 
-    return const_cast<OIndex*>(this)->m_pColumns;
+    return m_pColumns;
 }
 
 Reference< XPropertySet > SAL_CALL OIndex::createDataDescriptor(  ) throw(RuntimeException, std::exception)

connectivity/source/sdbcx/VKey.cxx

@@ -171,7 +171,7 @@ Reference< ::com::sun::star::container::XNameAccess > SAL_CALL OKey::getColumns(
         // allowed
     }
 
-    return const_cast<OKey*>(this)->m_pColumns;
+    return m_pColumns;
 }
 
 Reference< XPropertySet > SAL_CALL OKey::createDataDescriptor(  ) throw(RuntimeException, std::exception)

connectivity/source/sdbcx/VUser.cxx

@@ -117,7 +117,7 @@ Reference< XNameAccess > SAL_CALL OUser::getGroups(  ) throw(RuntimeException, s
         // allowed
     }
 
-    return const_cast<OUser*>(this)->m_pGroups;
+    return m_pGroups;
 }