[gtk/wip/chergert/glproto] be safer about clearing things even if we error

[Christian Hergert <chergert src gnome org>]

commit 2e8f881f4e67732b8168a2f4ba38250478ce1b60
Author: Christian Hergert <chergert redhat com>
Date:   Tue Dec 29 10:26:21 2020 -0800

    be safer about clearing things even if we error

 gsk/next/gskglcompiler.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gsk/next/gskglcompiler.c b/gsk/next/gskglcompiler.c
index d47edab28c..9c3038634f 100644
--- a/gsk/next/gskglcompiler.c
+++ b/gsk/next/gskglcompiler.c
@@ -266,6 +266,9 @@ gsk_gl_compiler_set_source (GskGLCompiler     *self,
       GBytes *fragment_bytes;
       GBytes *vertex_bytes;
 
+      g_clear_pointer (&self->fragment_source, g_bytes_unref);
+      g_clear_pointer (&self->vertex_source, g_bytes_unref);
+
       source = g_bytes_get_data (source_bytes, &len);
       endpos = source + len;
       vertex_shader_start = g_strstr_len (source, len, "VERTEX_SHADER");