[gimp] libgimpwidgets: fix some "incompatible pointer type" warnings on Win32.

[Jehan Pagès <jehanp src gnome org>]

commit 2fae5d7d8bc9508c716389164075f88b6c7f57cb
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 2 20:38:20 2016 +0200

    libgimpwidgets: fix some "incompatible pointer type" warnings on Win32.
    
    Thanks nmat for reporting the warning.

 libgimpwidgets/gimpwidgetsutils.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/libgimpwidgets/gimpwidgetsutils.c b/libgimpwidgets/gimpwidgetsutils.c
index 37fd73f..f5976bc 100644
--- a/libgimpwidgets/gimpwidgetsutils.c
+++ b/libgimpwidgets/gimpwidgetsutils.c
@@ -558,10 +558,10 @@ gimp_widget_get_color_profile (GtkWidget *widget)
         gchar  *path;
         gint32  len = 0;
 
-        GetICMProfile (hdc, &len, NULL);
+        GetICMProfile (hdc, (LPDWORD) &len, NULL);
         path = g_new (gchar, len);
 
-        if (GetICMProfile (hdc, &len, path))
+        if (GetICMProfile (hdc, (LPDWORD) &len, path))
           {
             GFile *file = g_file_new_for_path (path);