Fix warning

mhugent · nyalldawson · commit e90b58f6a1d4 · 2018-06-17T11:11:39.000+10:00
diff --git a/src/core/dxf/qgsdxfexport.cpp b/src/core/dxf/qgsdxfexport.cpp
@@ -1001,6 +1001,7 @@ void QgsDxfExport::writeEntities()
 
     auto scopePopper = [&ctx]( QgsExpressionContextScope * scope )
     {
+      Q_UNUSED( scope );
       delete ctx.expressionContext().popScope();
     };
     std::unique_ptr<QgsExpressionContextScope, decltype( scopePopper ) > layerScope( QgsExpressionContextUtils::layerScope( ml ), scopePopper );

Original file line number	Diff line number	Diff line change
`@@ -1001,6 +1001,7 @@ void QgsDxfExport::writeEntities()`
`1001`	`1001`
`1002`	`1002`	`auto scopePopper = [&ctx]( QgsExpressionContextScope * scope )`
`1003`	`1003`	`{`
	`1004`	`+ Q_UNUSED( scope );`
`1004`	`1005`	`delete ctx.expressionContext().popScope();`
`1005`	`1006`	`};`
`1006`	`1007`	`std::unique_ptr<QgsExpressionContextScope, decltype( scopePopper ) > layerScope( QgsExpressionContextUtils::layerScope( ml ), scopePopper );`