Minor cleanup to 6110fb5

src/gui/core/canvas.cpp

@@ -1494,16 +1494,12 @@ void canvas::parse_cfg(const config& cfg)
 
 void canvas::clear_shapes(const bool force)
 {
-	auto iter = std::remove_if(shapes_.begin(), shapes_.end(), [force](const shape_ptr s)
-	{
-		return !s->immutable() && !force;
-	});
+	auto conditional = [force](const shape_ptr s)->bool { return !s->immutable() && !force; };
+
+	auto iter = std::remove_if(shapes_.begin(), shapes_.end(), conditional);
 	shapes_.erase(iter, shapes_.end());
 
-	iter = std::remove_if(drawn_shapes_.begin(), drawn_shapes_.end(), [force](const shape_ptr s)
-	{
-		return !s->immutable() && !force;
-	});
+	iter = std::remove_if(drawn_shapes_.begin(), drawn_shapes_.end(), conditional);
 	drawn_shapes_.erase(iter, drawn_shapes_.end());
 }