tests: Fix warning about requiring to call init after qApp

src/qtcommon/Platform_qt.cpp

@@ -194,4 +194,10 @@ bool Platform_qt::isGammaray()
     return is;
 }
 
+Platform_qt::Platform_qt(int argc, char *argv[])
+{
+    Q_UNUSED(argc)
+    Q_UNUSED(argv)
+}
+
 #endif

src/qtcommon/Platform_qt.h

@@ -35,6 +35,7 @@ public:
 
 #ifdef DOCKS_DEVELOPER_MODE
     static bool isGammaray();
+    explicit Platform_qt(int argc, char *argv[]);
     bool tests_waitForWindowActive(std::shared_ptr<Window>, int timeout = 5000) const override;
     bool tests_waitForEvent(QObject *w, QEvent::Type type, int timeout = 5000) const override;
     bool tests_waitForEvent(View *, QEvent::Type type, int timeout = 5000) const override;