[librsvg] Add rsvg_drawing_ctx_get_pango_context() to call the virtual method

[Federico Mena Quintero <federico src gnome org>]

commit 408df468dba6049f10109641a1710b8e55cef5fc
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Dec 14 14:04:10 2017 -0600

    Add rsvg_drawing_ctx_get_pango_context() to call the virtual method
    
    Don't call it by poking at the vtable struct by hand.

 rsvg-base.c    | 6 ++++++
 rsvg-private.h | 3 +++
 rsvg-text.c    | 2 +-
 3 files changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/rsvg-base.c b/rsvg-base.c
index ba0a9fa..72c10b1 100644
--- a/rsvg-base.c
+++ b/rsvg-base.c
@@ -1792,6 +1792,12 @@ rsvg_drawing_ctx_set_current_state_affine (RsvgDrawingCtx *ctx, cairo_matrix_t *
         rsvg_current_state (ctx)->affine = *affine;
 }
 
+PangoContext *
+rsvg_drawing_ctx_get_pango_context (RsvgDrawingCtx *draw_ctx)
+{
+    return draw_ctx->render->get_pango_context (draw_ctx);
+}
+
 void
 rsvg_render_path_builder (RsvgDrawingCtx * ctx, RsvgPathBuilder *builder)
 {
diff --git a/rsvg-private.h b/rsvg-private.h
index f87c917..a923c0e 100644
--- a/rsvg-private.h
+++ b/rsvg-private.h
@@ -534,6 +534,9 @@ G_GNUC_INTERNAL
 void rsvg_drawing_ctx_set_current_state_affine (RsvgDrawingCtx *ctx, cairo_matrix_t *affine);
 
 G_GNUC_INTERNAL
+PangoContext *rsvg_drawing_ctx_get_pango_context (RsvgDrawingCtx *draw_ctx);
+
+G_GNUC_INTERNAL
 double _rsvg_css_accumulate_baseline_shift (RsvgState * state, RsvgDrawingCtx * ctx);
 
 /* Implemented in rust/src/length.rs */
diff --git a/rsvg-text.c b/rsvg-text.c
index 07a1b29..61190cb 100644
--- a/rsvg-text.c
+++ b/rsvg-text.c
@@ -562,7 +562,7 @@ rsvg_text_create_layout (RsvgDrawingCtx *ctx, const char *text)
 
     state = rsvg_current_state (ctx);
 
-    context = ctx->render->get_pango_context (ctx);
+    context = rsvg_drawing_ctx_get_pango_context (ctx);
 
     if (state->lang)
         pango_context_set_language (context, pango_language_from_string (state->lang));