Fix Qt3 libjpeg silent crash if compiled library version does not match the shared library version present on the local system

Thanks to "Fat-Zer" for the patch!

src/kernel/qjpegio.cpp

@@ -203,13 +203,13 @@ void read_jpeg_image(QImageIO* iio)
     struct my_jpeg_source_mgr *iod_src = new my_jpeg_source_mgr(iio);
     struct my_error_mgr jerr;
 
+    cinfo.err = jpeg_std_error(&jerr);
+    jerr.error_exit = my_error_exit;
+
     jpeg_create_decompress(&cinfo);
 
     cinfo.src = iod_src;
 
-    cinfo.err = jpeg_std_error(&jerr);
-    jerr.error_exit = my_error_exit;
-
     if (!setjmp(jerr.setjmp_buffer)) {
 #if defined(Q_OS_UNIXWARE)
 	(void) jpeg_read_header(&cinfo, B_TRUE);