From 071915407c2927d104ec8782ff7847122a8db764 Mon Sep 17 00:00:00 2001
From: Carles Fernandez <carles.fernandez@gmail.com>
Date: Mon, 11 Feb 2019 18:36:59 +0100
Subject: [PATCH] Use empty() instead of size() == 0

---
 src/tests/common-files/gnuplot_i.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tests/common-files/gnuplot_i.h b/src/tests/common-files/gnuplot_i.h
index 7ef3acad8..5944d01c3 100644
--- a/src/tests/common-files/gnuplot_i.h
+++ b/src/tests/common-files/gnuplot_i.h
@@ -861,7 +861,7 @@ Gnuplot &Gnuplot::plot_xy_err(const X &x,
     const E &dy,
     const std::string &title)
 {
-    if (x.size() == 0 || y.size() == 0 || dy.size() == 0)
+    if (x.empty() || y.empty() || dy.empty())
         {
             throw GnuplotException("std::vectors too small");
             return *this;