[shotwell] Speed-up raw sniffer

[Jens Georg <jensgeorg src gnome org>]

commit 3aaf9ca47bc239ce9c602db4e68924eb53cfeb6f
Author: Jens Georg <mail jensge org>
Date:   Wed Oct 23 21:17:28 2019 +0200

    Speed-up raw sniffer

 src/photos/RawSupport.vala | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/photos/RawSupport.vala b/src/photos/RawSupport.vala
index 8c238269..d457aa76 100644
--- a/src/photos/RawSupport.vala
+++ b/src/photos/RawSupport.vala
@@ -174,7 +174,6 @@ public class RawSniffer : PhotoFileSniffer {
         
         try {
             processor.open_file(file.get_path());
-            processor.unpack();
             processor.adjust_sizes_info_only();
         } catch (GRaw.Exception exception) {
             if (exception is GRaw.Exception.UNSUPPORTED_FILE)
@@ -195,7 +194,7 @@ public class RawSniffer : PhotoFileSniffer {
             // ignored
         }
         
-        if (detected.metadata != null) {
+        if (calc_md5 && detected.metadata != null) {
             detected.exif_md5 = detected.metadata.exif_hash();
             detected.thumbnail_md5 = detected.metadata.thumbnail_hash();
         }