[gexiv2] Add BMFF support

[Jens Georg <jensgeorg src gnome org>]

commit 67bebfb90c8b148020a2578a46d924534be183f3
Author: Peter Kovář <peter kovar reflexion tv>
Date:   Tue Mar 16 14:07:45 2021 +0100

    Add BMFF support

 gexiv2/gexiv2-startup.cpp | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/gexiv2/gexiv2-startup.cpp b/gexiv2/gexiv2-startup.cpp
index 014327f..011cc9b 100644
--- a/gexiv2/gexiv2-startup.cpp
+++ b/gexiv2/gexiv2-startup.cpp
@@ -12,6 +12,10 @@
 #include "gexiv2-version.h"
 
 gboolean gexiv2_initialize(void) {
+#if EXIV2_TEST_VERSION(0,27,4)
+    Exiv2::enableBMFF();
+#endif
+
     return Exiv2::XmpParser::initialize();
 }