fix tidy modernize-deprecated-headers

diff --git a/gui/filterwidgets.cc b/gui/filterwidgets.cc
index 2e638eae4be34ebe1ed2b8355ad47ab1c0fa1d6a..39426e171ae9a0ec209ba4661cb1d15376eec9d6 100644 (file)
--- a/gui/filterwidgets.cc
+++ b/gui/filterwidgets.cc
@@ -22,7 +22,7 @@
 
 #include "filterwidgets.h"
 
-#include <assert.h>      // for assert
+#include <cassert>       // for assert
 #include <limits>        // for numeric_limits
 
 #include <QChar>         // for QChar