[glib/glib-2-32] Support initial underscores in dbus codegen namespace

[Alexander Larsson <alexl src gnome org>]

commit 5051aaca68eacf280ce48d1500a19cccf2125fc8
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Apr 16 09:55:29 2012 +0200

    Support initial underscores in dbus codegen namespace
    
    Before these were considered lowercase and thus got duplicated.
    (cherry picked from commit ff92fe95935b38eaacedb287f6600df000ed1c1a)

 gio/gdbus-2.0/codegen/utils.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gio/gdbus-2.0/codegen/utils.py b/gio/gdbus-2.0/codegen/utils.py
index 687b979..94bd05c 100644
--- a/gio/gdbus-2.0/codegen/utils.py
+++ b/gio/gdbus-2.0/codegen/utils.py
@@ -44,7 +44,14 @@ def camel_case_to_uscore(s):
     ret = ''
     insert_uscore = False
     prev_was_lower = False
+    initial = True;
     for c in s:
+        # Keep initial underscores in camel case
+        if initial and c == '_':
+            ret += '_'
+            continue;
+        initial = False
+
         if c.isupper():
             if prev_was_lower:
                 insert_uscore = True