clang-tidy -fix: modernize-deprecated-headers

src/lib/localeHandling.cpp

@@ -12,7 +12,7 @@ the Free Software Foundation, either version 3 of the License, or
 #include <QtCore/QDebug>
 #include <QtCore/QList>
 #include <QtGlobal>
-#include <locale.h>
+#include <clocale>
 
 auto LocaleHandling::setLocale(const QString &lcName) -> QString
 {

src/mltconnection.cpp

@@ -18,8 +18,8 @@ the Free Software Foundation, either version 3 of the License, or
 #include <klocalizedstring.h>
 #include <QtConcurrent>
 
+#include <clocale>
 #include <lib/localeHandling.h>
-#include <locale.h>
 #include <mlt++/MltFactory.h>
 #include <mlt++/MltRepository.h>