[gthumb] build error when JPEG_LIB_VERSION < 80

[Paolo Bacchilega <paobac src gnome org>]

commit a3cf5b19865412f413429b3abb044c0eb1c04f90
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat May 11 17:17:39 2019 +0200

    build error when JPEG_LIB_VERSION < 80
    
    https://gitlab.gnome.org/GNOME/gthumb/issues/44

 extensions/jpeg_utils/jpegtran.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/extensions/jpeg_utils/jpegtran.c b/extensions/jpeg_utils/jpegtran.c
index c303758c..738a921b 100644
--- a/extensions/jpeg_utils/jpegtran.c
+++ b/extensions/jpeg_utils/jpegtran.c
@@ -186,18 +186,18 @@ jpegtran_internal (struct jpeg_decompress_struct  *srcinfo,
        }
 
        transformoption.transform = transform;
-       transformoption.perfect = (mcu_action == JPEG_MCU_ACTION_ABORT);
        transformoption.trim = (mcu_action == JPEG_MCU_ACTION_TRIM);
        transformoption.force_grayscale = FALSE;
 #if JPEG_LIB_VERSION >= 80
+       transformoption.perfect = (mcu_action == JPEG_MCU_ACTION_ABORT);
        transformoption.crop = FALSE;
        transformoption.crop_width_set = FALSE;
        transformoption.crop_height_set = FALSE;
        transformoption.crop_xoffset_set = FALSE;
        transformoption.crop_yoffset_set = FALSE;
-#endif
 #ifdef LIBJPEG_TURBO_VERSION
        transformoption.slow_hflip = FALSE;
+#endif
 #endif
 
        /* Enable saving of extra markers that we want to copy */