gui: apply clang-tidy suggestion

LucasYuki · LucasYuki · commit ea5ed351a556 · 2025-10-17T01:54:48.000Z
Signed-off-by: LucasYuki &lt;lucasyuki@yahoo.com.br&gt;
diff --git a/src/gui/src/dropdownCheckboxes.h b/src/gui/src/dropdownCheckboxes.h
@@ -4,6 +4,7 @@
 #pragma once
 
 #include <qchar.h>
+#include <qnamespace.h>
 #include <qobjectdefs.h>
 
 #include <QComboBox>
