[glib/fix-ghashtable-pretty-printer] gdb: Fix GHashTable pretty printer off-by-one error

[Philip Chimento <pchimento src gnome org>]

commit 9042326ffc8379fd50bf2394078385b6fb70c876
Author: Philip Chimento <philip endlessm com>
Date:   Tue Nov 5 14:28:41 2019 -0800

    gdb: Fix GHashTable pretty printer off-by-one error
    
    Commit 7678b107 seems to have left the GHashTable pretty printer with an
    off-by-one error, skipping the first key it encounters and printing an
    extra garbage key/value pair instead. This fixes that by moving an
    increment to the end of a loop rather than the beginning.

 glib/glib_gdb.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/glib/glib_gdb.py b/glib/glib_gdb.py
index 37d01cb76..fd8baf58c 100644
--- a/glib/glib_gdb.py
+++ b/glib/glib_gdb.py
@@ -124,7 +124,6 @@ class GHashPrinter:
                 self.value = None
                 return v
             while long(self.pos) < long(self.size):
-                self.pos = self.pos + 1
                 if long (self.hashes[self.pos]) >= 2:
                     key = self.keys[self.pos]
                     val = self.values[self.pos]
@@ -135,8 +134,12 @@ class GHashPrinter:
                     # Queue value for next result
                     self.value = ('[%dv]'% (self.pos), val)
 
-                    # Return key
-                    return ('[%dk]'% (self.pos), key)
+                    # Increment pos and return key
+                    key = ('[%dk]'% (self.pos), key)
+                    self.pos += 1
+                    return key
+
+                self.pos += 1
             raise StopIteration
 
         __next__ = next