Fixes:
Direct leak of 32 byte(s) in 1 object(s) allocated from:
#0 0x7eff8bcf46c8 in operator new(unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:95
#1 0x7eff897b484d in DeviceUserArgs::serialize() const sdrbase/device/deviceuserargs.cpp:43
#2 0x7eff897f4904 in MainSettings::save() const sdrbase/settings/mainsettings.cpp:237
#3 0x7eff8b578654 in MainWindow::closeEvent(QCloseEvent*) sdrgui/mainwindow.cpp:1749
#4 0x7eff877a5dc7 in QWidget::event(QEvent*) (/lib/x86_64-linux-gnu/libQt5Widgets.so.5+0x1a5dc7) (BuildId: 983eca66d9695a1892aa796da4160d8d6f9b9ac4)
Direct leak of 32 byte(s) in 1 object(s) allocated from:
#0 0x7eff8bcf46c8 in operator new(unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:95
#1 0x7eff897b484d in DeviceUserArgs::serialize() const sdrbase/device/deviceuserargs.cpp:43
#2 0x7eff897f4904 in MainSettings::save() const sdrbase/settings/mainsettings.cpp:237
#3 0x7eff8b552c9a in MainWindow::~MainWindow() sdrgui/mainwindow.cpp:326
#4 0x564e8b36e1e5 in runQtApplication app/main.cpp:212
#5 0x564e8b36bab7 in main app/main.cpp:248
#6 0x7eff862456c9 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
