Merge branch 'backport-1218-hashtable-printer-glib-2-62' into 'glib-2-62'

Backport !1218 “gdb: Fix GHashTable pretty printer off-by-one error”

See merge request GNOME/glib!1219

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