[gthumb/ext] allow exiv2 to read metadata from all images, not only jpeg

[Paolo Bacchilega <paobac src gnome org>]

commit 5dabd6e5187720def19e4115d4ad570a18b57d83
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Aug 29 19:44:38 2009 +0200

    allow exiv2 to read metadata from all images, not only jpeg
    
    [bug #593379]

 extensions/exiv2/gth-metadata-provider-exiv2.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/extensions/exiv2/gth-metadata-provider-exiv2.c b/extensions/exiv2/gth-metadata-provider-exiv2.c
index 77e9105..f156881 100644
--- a/extensions/exiv2/gth-metadata-provider-exiv2.c
+++ b/extensions/exiv2/gth-metadata-provider-exiv2.c
@@ -50,7 +50,7 @@ gth_metadata_provider_exiv2_read (GthMetadataProvider *self,
 	char        *sidecar_uri;
 	GthFileData *sidecar_file_data;
 
-	if (! g_content_type_equals (gth_file_data_get_mime_type (file_data), "image/jpeg"))
+	if (! g_content_type_is_a (gth_file_data_get_mime_type (file_data), "image/*"))
 		return;
 
 	/* this function is executed in a secondary thread, so calling