[gexiv2/gexiv2-0.10] Use correct Exiv2 tag for get_fnumber: Bug #745347

[Jim Nelson <jnelson src gnome org>]

commit 009ff4a0e1a6f68f339c6578eaf84062f9e2cf4f
Author: Jim Nelson <jim yorba org>
Date:   Mon Mar 2 15:19:33 2015 -0800

    Use correct Exiv2 tag for get_fnumber: Bug #745347

 gexiv2/gexiv2-metadata.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gexiv2/gexiv2-metadata.cpp b/gexiv2/gexiv2-metadata.cpp
index 3e26a05..07d76e9 100644
--- a/gexiv2/gexiv2-metadata.cpp
+++ b/gexiv2/gexiv2-metadata.cpp
@@ -741,7 +741,7 @@ gboolean gexiv2_metadata_get_exposure_time (GExiv2Metadata *self, gint *nom, gin
 }
 
 gdouble gexiv2_metadata_get_fnumber (GExiv2Metadata *self) {
-    return gexiv2_metadata_get_exif_tag_rational_as_double(self, "Exif.Photo.Fnumber", -1.0);
+    return gexiv2_metadata_get_exif_tag_rational_as_double(self, "Exif.Photo.FNumber", -1.0);
 }
 
 gdouble gexiv2_metadata_get_focal_length (GExiv2Metadata *self) {