[gtksourceviewmm] generate_extra_defs: Adapt to changed gtk_init() API.

[Murray Cumming <murrayc src gnome org>]

commit aea0c00fc22bfb2a76ec7da9ba6d0c98ae582ba5
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Mar 31 11:53:03 2017 +0200

    generate_extra_defs: Adapt to changed gtk_init() API.

 .../extradefs/generate_extra_defs_gtksourceview.cc |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/codegen/extradefs/generate_extra_defs_gtksourceview.cc 
b/codegen/extradefs/generate_extra_defs_gtksourceview.cc
index db4b5ab..3bc80d6 100644
--- a/codegen/extradefs/generate_extra_defs_gtksourceview.cc
+++ b/codegen/extradefs/generate_extra_defs_gtksourceview.cc
@@ -23,9 +23,9 @@
 #include <gtksourceview/gtksource.h>
 #include <gtksourceview/completion-providers/words/gtksourcecompletionwords.h>
 
-int main (int argc, char *argv[])
+int main ()
 {
-  gtk_init(&argc, &argv);
+  gtk_init();
 
   std::cout << get_defs (GTK_SOURCE_TYPE_BUFFER)
             << get_defs (GTK_SOURCE_TYPE_COMPLETION)