[gegl/wip/nielsdg/vapi-fixes: 2/2] Fix some VAPI annotations

[Niels De Graef <nielsdg src gnome org>]

commit 73f519ae2b6ce2a4f7757bd8c23f746839c9e98d
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Fri May 8 01:05:21 2020 +0200

    Fix some VAPI annotations
    
    * No need for cheader_filename="gegl.h", since the GIR file now
      correctly includes it
    * Mark init.argv as `(optional)`, since NULL is a valid value
    * Mark some vararg functions as skip=false since Vala can handle these

 gegl/Gegl.metadata.in | 11 +++++++++--
 gegl/gegl-init.h      |  2 +-
 2 files changed, 10 insertions(+), 3 deletions(-)
---
diff --git a/gegl/Gegl.metadata.in b/gegl/Gegl.metadata.in
index 75e8dd41e..f53e3f511 100644
--- a/gegl/Gegl.metadata.in
+++ b/gegl/Gegl.metadata.in
@@ -1,5 +1,12 @@
-Gegl cheader_filename="gegl.h"
 ParamSpecFormat skip
 ParamFormat skip
 param_spec_format skip
-init.argv unowned
\ No newline at end of file
+init.argv unowned
+
+render_op skip=false
+apply_op skip=false
+filter_op skip=false
+
+Node
+  .new_child skip=false
+  .link_many skip=false
diff --git a/gegl/gegl-init.h b/gegl/gegl-init.h
index 96706ea2b..3952419d2 100644
--- a/gegl/gegl-init.h
+++ b/gegl/gegl-init.h
@@ -42,7 +42,7 @@ G_BEGIN_DECLS
 
 /**
  * gegl_init:
- * @argc: (inout): a pointer to the number of command line arguments.
+ * @argc: (inout) (optional): a pointer to the number of command line arguments.
  * @argv: (inout) (array length=argc) (allow-none): a pointer to the array of command line arguments.
  *
  * Call this function before using any other GEGL functions. It will