[mutter] cogl: GLES3 has glGetStringi

[Jonas Ådahl <jadahl src gnome org>]

commit b4226daadb777aa584729110fd1f5e49a5844e91
Author: Adam Jackson <ajax redhat com>
Date:   Tue Oct 22 18:50:47 2019 -0400

    cogl: GLES3 has glGetStringi
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/882

 cogl/cogl/driver/gl/gles/cogl-driver-gles.c  | 4 ++++
 cogl/cogl/gl-prototypes/cogl-all-functions.h | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/cogl/cogl/driver/gl/gles/cogl-driver-gles.c b/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
index fc04c8c91..09c9dd788 100644
--- a/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
+++ b/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
@@ -253,6 +253,10 @@ _cogl_driver_update_features (CoglContext *context,
     (void *) _cogl_renderer_get_proc_address (context->display->renderer,
                                               "glGetString",
                                               TRUE);
+  context->glGetStringi =
+    (void *) _cogl_renderer_get_proc_address (context->display->renderer,
+                                              "glGetStringi",
+                                              TRUE);
 
   gl_extensions = _cogl_context_get_gl_extensions (context);
 
diff --git a/cogl/cogl/gl-prototypes/cogl-all-functions.h b/cogl/cogl/gl-prototypes/cogl-all-functions.h
index 512b6d4ce..80d60702d 100644
--- a/cogl/cogl/gl-prototypes/cogl-all-functions.h
+++ b/cogl/cogl/gl-prototypes/cogl-all-functions.h
@@ -181,7 +181,7 @@ COGL_EXT_FUNCTION (void, glSamplerParameteri,
 COGL_EXT_END ()
 
 COGL_EXT_BEGIN (only_gl3, 3, 0,
-                0, /* not in either GLES */
+                COGL_EXT_IN_GLES3,
                 "\0",
                 "\0")
 COGL_EXT_FUNCTION (const GLubyte *, glGetStringi,