Fix overwriting memory for an application icon

This resolves Bug 2033

src/kernel/qimage.cpp

@@ -1531,12 +1531,12 @@ static bool convert_32_to_8( const QImage *src, QImage *dst, int conversion_flag
 	int* line2[3];
 	int* pv[3];
 	if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::DiffuseDither ) {
-	    line1[0] = new int[src->width()];
-	    line2[0] = new int[src->width()];
-	    line1[1] = new int[src->width()];
-	    line2[1] = new int[src->width()];
-	    line1[2] = new int[src->width()];
-	    line2[2] = new int[src->width()];
+	    line1[0] = new int[sw];
+	    line2[0] = new int[sw];
+	    line1[1] = new int[sw];
+	    line2[1] = new int[sw];
+	    line1[2] = new int[sw];
+	    line2[2] = new int[sw];
 	    pv[0] = new int[sw];
 	    pv[1] = new int[sw];
 	    pv[2] = new int[sw];

src/kernel/qpixmap_x11.cpp

@@ -764,6 +764,7 @@ QImage QPixmap::convertToImage() const
         else
 #endif
         qSafeXDestroyImage( xi );
+	((QPixmap*)this)->data->ximage = 0;
 	return image;
     }
 
@@ -947,7 +948,8 @@ QImage QPixmap::convertToImage() const
             qt_XShmDestroyImage( xi, &shminfo );
         else
 #endif
-            qSafeXDestroyImage( xi );
+	qSafeXDestroyImage( xi );
+	((QPixmap*)this)->data->ximage = 0;
 	return image;
     }
 

src/kernel/qwidget_x11.cpp

@@ -1336,7 +1336,6 @@ void QWidget::setIcon( const QPixmap &pixmap )
 		    int r = int( qRed( l ) );
 		    int g = int( qGreen( l ) );
 		    int b = int( qBlue( l ) );
-		    ls[x] = qRgb( r, g, b );
 		    XSetForeground(x11Display(), gc, (r << 16) | (g << 8) | b );
 		    XDrawPoint(x11Display(), pmHandle, gc, x, y);
 		}