clutter-stage-cogl: Fix uninitialized variable `use_clipped_redraw`

I noticed my system would fall back to the slow unclipped (and
uncullable) paint path whenever a window touched the left edge of
the screen. Turns out that was a red herring. Just that
`use_clipped_redraw` was uninitialized so clipping/culling was used
randomly.

So the compiler failed to notice `use_clipped_redraw` was uninitialized.
Weirdly, as soon as you fix that it starts complaining that `buffer_age`
might be uninitialized, which appears to be wrong. So we initialize that
too, to shut up the compiler warnings/errors.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1323

1 files changed, 2 insertions, 2 deletions

diff --git a/clutter/clutter/cogl/clutter-stage-cogl.c b/clutter/clutter/cogl/clutter-stage-cogl.c
index db87e3933..f7f71e6e1 100644
--- a/clutter/clutter/cogl/clutter-stage-cogl.c
+++ b/clutter/clutter/cogl/clutter-stage-cogl.c
@@ -551,7 +551,7 @@ clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
   CoglFramebuffer *onscreen = clutter_stage_view_get_onscreen (view);
   cairo_rectangle_int_t view_rect;
   gboolean is_full_redraw;
-  gboolean use_clipped_redraw;
+  gboolean use_clipped_redraw = TRUE;
   gboolean can_blit_sub_buffer;
   gboolean has_buffer_age;
   gboolean swap_with_damage;
@@ -561,7 +561,7 @@ clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
   cairo_region_t *swap_region;
   float fb_scale;
   int fb_width, fb_height;
-  int buffer_age;
+  int buffer_age = 0;
   gboolean res;
 
   clutter_stage_view_get_layout (view, &view_rect);