QWidget *wid = 0;

delete wid;

is legal c++ code.
So make sure when freeing we obey c++ but take into
account that free(NULL) is not legal.

1 files changed, 8 insertions, 4 deletions

diff --git a/library/qpeapplication.cpp b/library/qpeapplication.cpp
index 43a9be5..af00f49 100644
--- a/library/qpeapplication.cpp
+++ b/library/qpeapplication.cpp
@@ -2146,173 +2146,177 @@ void QPEApplication::ungrabKeyboard()
 {
     ((QPEApplication *) qApp )-> d-> kbgrabbed = false;
 }
 
 /*!
   Grabs the physical keyboard keys, e.g. the application's launching
   keys. Instead of launching applications when these keys are pressed
   the signals emitted are sent to this application instead. Some games
   programs take over the launch keys in this way to make interaction
   easier.
 
   \sa ungrabKeyboard()
 */
 void QPEApplication::grabKeyboard()
 {
     ((QPEApplication *) qApp )-> d-> kbgrabbed = true;
 }
 
 /*!
   \reimp
 */
 int QPEApplication::exec()
 {
         d->qcopQok = true;
 #ifndef QT_NO_COP
     d->sendQCopQ();
         if ( !d->keep_running )
             processEvents(); // we may have received QCop messages in the meantime.
 #endif
 
     if ( d->keep_running )
         //|| d->qpe_main_widget && d->qpe_main_widget->isVisible() )
         return QApplication::exec();
 
 #ifndef QT_NO_COP
 
     {
         QCopEnvelope e( "QPE/System", "closing(QString)" );
         e << d->appName;
     }
 #endif
     processEvents();
     return 0;
 }
 
 /*!
   \internal
   External request for application to quit.  Quits if possible without
   loosing state.
 */
 void QPEApplication::tryQuit()
 {
     if ( activeModalWidget() )
         return ; // Inside modal loop or konsole. Too hard to save state.
 #ifndef QT_NO_COP
 
     {
         QCopEnvelope e( "QPE/System", "closing(QString)" );
         e << d->appName;
     }
 #endif
     if ( d->keep_running )
     d->store_widget_rect(d->qpe_main_widget, d->appName);
     processEvents();
 
     quit();
 }
 
 
 /*!
   \internal
   User initiated quit.  Makes the window 'Go Away'.  If preloaded this means
   hiding the window.  If not it means quitting the application.
   As this is user initiated we don't need to check state.
 */
 void QPEApplication::hideOrQuit()
 {
     if ( d->keep_running )
     d->store_widget_rect(d->qpe_main_widget, d->appName);
     processEvents();
 
     // If we are a preloaded application we don't actually quit, so emit
     // a System message indicating we're quasi-closing.
     if ( d->preloaded && d->qpe_main_widget )
 #ifndef QT_NO_COP
 
     {
         QCopEnvelope e("QPE/System", "fastAppHiding(QString)" );
         e << d->appName;
         d->qpe_main_widget->hide();
     }
 #endif
     else
         quit();
 }
 
 #if (__GNUC__ > 2 )
 extern "C" void __cxa_pure_virtual();
 
 void __cxa_pure_virtual()
 {
     fprintf( stderr, "Pure virtual called\n");
     abort();
 
 }
 
 #endif
 
 
 #if defined(OPIE_NEW_MALLOC)
 
 // The libraries with the skiff package (and possibly others) have
 // completely useless implementations of builtin new and delete that
 // use about 50% of your CPU. Here we revert to the simple libc
 // functions.
 
 void* operator new[]( size_t size )
 {
     return malloc( size );
 }
 
 void* operator new( size_t size )
 {
     return malloc( size );
 }
 
 void operator delete[]( void* p )
 {
-    free( p );
+    if ( p )
+        free( p );
 }
 
 void operator delete[]( void* p, size_t /*size*/ )
 {
-    free( p );
+    if ( p )
+        free( p );
 }
 
 
 void operator delete( void* p )
 {
-    free( p );
+    if ( p )
+        free( p );
 }
 
 void operator delete( void* p, size_t /*size*/ )
 {
-    free( p );
+    if ( p )
+        free( p );
 }
 
 #endif
 
 #if ( QT_VERSION <= 230 ) && !defined(SINGLE_APP)
 #include <qwidgetlist.h>
 #ifdef QWS
 #include <qgfx_qws.h>
 extern QRect qt_maxWindowRect;
 void qt_setMaxWindowRect(const QRect& r )
 {
     qt_maxWindowRect = qt_screen->mapFromDevice( r,
                        qt_screen->mapToDevice( QSize( qt_screen->width(), qt_screen->height() ) ) );
     // Re-resize any maximized windows
     QWidgetList* l = QApplication::topLevelWidgets();
     if ( l ) {
         QWidget * w = l->first();
         while ( w ) {
             if ( w->isVisible() && w->isMaximized() ) {
                 w->showMaximized();
             }
             w = l->next();
         }
         delete l;
     }
 }
 #endif
 #endif