[gexiv2/fix-gexiv2-tool-init] gexiv2-tool: Add missing initialize call

[Jens Georg <jensgeorg src gnome org>]

commit def3e4810060a685e7b76c3fc483d676ab28e055
Author: Jens Georg <mail jensge org>
Date:   Sat Dec 25 15:30:35 2021 +0100

    gexiv2-tool: Add missing initialize call
    
    This call is necessary to initililze the XMP parser and enable support
    for ISO-container based files in gexiv2-tool if available in exiv2

 tools/gexiv2-tool.vala | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/tools/gexiv2-tool.vala b/tools/gexiv2-tool.vala
index 780d0cc..e3e7672 100644
--- a/tools/gexiv2-tool.vala
+++ b/tools/gexiv2-tool.vala
@@ -59,6 +59,8 @@ int main(string[] args) {
     var program_name = extract_filename(args[0]);
     print_single_tag = "";
 
+    GExiv2.initialize();
+
     // Setup and parse program parameters
     OptionContext opt_context;
     try {