[win32] Fix double buffer paint with ImageGcDrawer#2122

HeikoKlare merged 1 commit intoeclipse-platform:mastereclipse-platform/eclipse.platform.swt:masterfrom

vi-eclipse:win32-fix-double-buffer-painting-with-image-gc-drawervi-eclipse/eclipse.platform.swt:win32-fix-double-buffer-painting-with-image-gc-drawerCopy head branch name to clipboard