[gtk+] make GDK_DEBUG=opengl work on win32

[Chun-wei Fan <fanchunwei src gnome org>]

commit 15491cf6e4e1b36691c5d790006864797029962f
Author: Lukas K <lu 0x83 eu>
Date:   Sun Oct 29 00:07:34 2017 +0200

    make GDK_DEBUG=opengl work on win32

 gdk/win32/gdkglcontext-win32.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/win32/gdkglcontext-win32.c b/gdk/win32/gdkglcontext-win32.c
index e367bf2..8a5a1c2 100644
--- a/gdk/win32/gdkglcontext-win32.c
+++ b/gdk/win32/gdkglcontext-win32.c
@@ -429,10 +429,10 @@ _gdk_win32_display_init_gl (GdkDisplay *display)
             g_print ("WGL API version %d.%d found\n"
                      " - Vendor: %s\n"
                      " - Checked extensions:\n"
-                     "\t* WGL_ARB_pixel_format: %s\n",
+                     "\t* WGL_ARB_pixel_format: %s\n"
                      "\t* WGL_ARB_create_context: %s\n"
                      "\t* WGL_EXT_swap_control: %s\n"
-                     "\t* WGL_OML_sync_control: %s\n",
+                     "\t* WGL_OML_sync_control: %s\n"
                      "\t* WGL_ARB_multisample: %s\n",
                      display_win32->gl_version / 10,
                      display_win32->gl_version % 10,