[pango] Fix parameter name to match implementation

[Matthias Clasen <matthiasc src gnome org>]

commit fd7d30b646ba0e2a7b08ac774c2216ec3ed805dd
Author: Matijs van Zuijlen <matijs matijs net>
Date:   Thu Apr 27 18:29:24 2017 +0200

    Fix parameter name to match implementation
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781857

 pango/pango-font.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/pango/pango-font.h b/pango/pango-font.h
index cdc07cd..a970295 100644
--- a/pango/pango-font.h
+++ b/pango/pango-font.h
@@ -609,9 +609,9 @@ struct _PangoFontClass
 
   PangoFontDescription *(*describe)           (PangoFont      *font);
   PangoCoverage *       (*get_coverage)       (PangoFont      *font,
-                                              PangoLanguage  *lang);
+                                              PangoLanguage  *language);
   PangoEngineShape *    (*find_shaper)        (PangoFont      *font,
-                                              PangoLanguage  *lang,
+                                              PangoLanguage  *language,
                                               guint32         ch);
   void                  (*get_glyph_extents)  (PangoFont      *font,
                                               PangoGlyph      glyph,