1 files changed, 1 insertions, 0 deletions
diff --git a/barchart.cpp b/barchart.cpp
index 70c6004..3adf441 100644
--- a/barchart.cpp
+++ b/barchart.cpp
@@ -105,6 +105,7 @@ void BarChart::brushItem(int item)
         m_brushedItem = item;
         emit itemBrushed(m_brushedItem);
     } else {
+        // safe comparison: we just checked for negative values
         if (m_values.n_elem == 0 || item > m_values.n_elem - 1) {
             return;
         }