backport buffer overrun fix from qt 3.1.2.

ok pval@

x11/qt3/patches/patch-src_kernel_qjpegio_cpp

@@ -0,0 +1,12 @@
+$OpenBSD: patch-src_kernel_qjpegio_cpp,v 1.1 2003/03/04 18:06:59 espie Exp $
+--- src/kernel/qjpegio.cpp.orig	Tue Mar  4 19:00:44 2003
++++ src/kernel/qjpegio.cpp	Tue Mar  4 19:02:09 2003
+@@ -235,7 +235,7 @@ void read_jpeg_image(QImageIO* iio)
+ 
+ 
+ 	} else if ( params.contains( "Scale" ) ) {
+-	    sscanf( params.latin1(), "Scale( %i, %i, %s )", &sWidth, &sHeight, sModeStr );
++	    sscanf( params.latin1(), "Scale( %i, %i, %1023s )", &sWidth, &sHeight, sModeStr );
+ 
+ 	    QString sModeQStr( sModeStr );
+ 	    if ( sModeQStr == "ScaleFree" ) {