Check for valid winId

app/SysTray-X/windowctrl-unix.cpp

@@ -237,6 +237,11 @@ QList< quint64 >   WindowCtrlUnix::getWinIds()
  */
 void    WindowCtrlUnix::minimizeWindow( quint64 window, bool hide )
 {
+    if( !window )
+    {
+        return;
+    }
+
     Window win = static_cast<Window>( window );
 
     if( hide )
@@ -254,6 +259,11 @@ void    WindowCtrlUnix::minimizeWindow( quint64 window, bool hide )
  */
 void    WindowCtrlUnix::normalizeWindow( quint64 window )
 {
+    if( !window )
+    {
+        return;
+    }
+
     Window win = static_cast<Window>( window );
 
     hideWindow( win, false );
@@ -278,6 +288,11 @@ void    WindowCtrlUnix::normalizeWindow( quint64 window )
  */
 void    WindowCtrlUnix::hideWindow( quint64 window, bool set )
 {
+    if( !window )
+    {
+        return;
+    }
+
     Window win = static_cast<Window>( window );
 
     char prop_name[] = "_NET_WM_STATE";
@@ -360,6 +375,11 @@ void    WindowCtrlUnix::hideWindow( quint64 window, bool set )
  */
 void    WindowCtrlUnix::deleteWindow( quint64 window )
 {
+    if( !window )
+    {
+        return;
+    }
+
     Window win = static_cast<Window>( window );
 
     Atom prop = XInternAtom( m_display, "WM_PROTOCOLS", True );

app/SysTray-X/windowctrl-win.cpp

@@ -198,6 +198,11 @@ QList< quint64 >   WindowCtrlWin::getWinIds()
  */
 void    WindowCtrlWin::minimizeWindow( quint64 window, bool hide )
 {
+    if( !window )
+    {
+        return;
+    }
+
     ShowWindow( (HWND)window, SW_MINIMIZE );
 
     if( hide )
@@ -212,6 +217,11 @@ void    WindowCtrlWin::minimizeWindow( quint64 window, bool hide )
  */
 void    WindowCtrlWin::normalizeWindow( quint64 window )
 {
+    if( !window )
+    {
+        return;
+    }
+
     ShowWindow( (HWND)window, SW_RESTORE );
     SetForegroundWindow( (HWND)window );
 }
@@ -222,6 +232,11 @@ void    WindowCtrlWin::normalizeWindow( quint64 window )
  */
 void    WindowCtrlWin::hideWindow( quint64 window, bool state )
 {
+    if( !window )
+    {
+        return;
+    }
+
     if( state )
     {
         hideWindow( (HWND)window );
@@ -249,6 +264,11 @@ void    WindowCtrlWin::hideWindow( HWND hwnd )
  */
 void    WindowCtrlWin::deleteWindow( quint64 window )
 {
+    if( !window )
+    {
+        return;
+    }
+
     SendMessageA(  (HWND)window, WM_CLOSE, 0, 0 );
 }