[PATCH v2 05/10] ui/gtk-gl-area: Plug memleak in gd_gl_area_create_context()

[Pan Nengyuan]

Receiving error in local variable err, and forgot to free it.
This patch check the return value of 'gdk_window_create_gl_context'
and 'gdk_gl_context_realize', then free err to fix it.

Reported-by: Euler Robot <euler.ro...@huawei.com>
Signed-off-by: Pan Nengyuan <pannengy...@huawei.com>
---
Cc: Gerd Hoffmann <kra...@redhat.com>
---
V2->V1: check the return value of  'gdk_window_create_gl_context'
and 'gdk_gl_context_realize' instead of omitting it(Suggested by Li Qiang)
---
 ui/gtk-gl-area.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 85f9d14c51..98c22d23f5 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -147,10 +147,21 @@ QEMUGLContext 
gd_gl_area_create_context(DisplayChangeListener *dcl,
     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
     window = gtk_widget_get_window(vc->gfx.drawing_area);
     ctx = gdk_window_create_gl_context(window, &err);
+    if (err) {
+        g_printerr("Create gdk gl context failed: %s\n", err->message);
+        g_error_free(err);
+        return NULL;
+    }
     gdk_gl_context_set_required_version(ctx,
                                         params->major_ver,
                                         params->minor_ver);
     gdk_gl_context_realize(ctx, &err);
+    if (err) {
+        g_printerr("Realize gdk gl context failed: %s\n", err->message);
+        g_error_free(err);
+        g_clear_object(&ctx);
+        return NULL;
+    }
     return ctx;
 }
 
-- 
2.18.2