[glib] win32: fix warnings avoid discarding const qualifier

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 5f4b92202b2a36097ffa54fc7dbf96f692074069
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Mon Dec 21 12:21:03 2015 +0100

    win32: fix warnings avoid discarding const qualifier

 gio/win32/gwin32fsmonitorutils.c |    4 ++--
 gio/win32/gwin32fsmonitorutils.h |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gio/win32/gwin32fsmonitorutils.c b/gio/win32/gwin32fsmonitorutils.c
index 6901561..e164217 100644
--- a/gio/win32/gwin32fsmonitorutils.c
+++ b/gio/win32/gwin32fsmonitorutils.c
@@ -237,8 +237,8 @@ g_win32_fs_monitor_callback (DWORD        error,
 
 void
 g_win32_fs_monitor_init (GWin32FSMonitorPrivate *monitor,
-                         gchar *dirname,
-                         gchar *filename,
+                         const gchar *dirname,
+                         const gchar *filename,
                          gboolean isfile)
 {
   wchar_t *wdirname_with_long_prefix = NULL;
diff --git a/gio/win32/gwin32fsmonitorutils.h b/gio/win32/gwin32fsmonitorutils.h
index 0606d67..96e0716 100644
--- a/gio/win32/gwin32fsmonitorutils.h
+++ b/gio/win32/gwin32fsmonitorutils.h
@@ -63,8 +63,8 @@ enum GWin32FileMonitorFileAlias
 GWin32FSMonitorPrivate* g_win32_fs_monitor_create (gboolean isfile);
 
 void g_win32_fs_monitor_init (GWin32FSMonitorPrivate *monitor,
-                              gchar *dirname,
-                              gchar *filename,
+                              const gchar *dirname,
+                              const gchar *filename,
                               gboolean isfile);
 
 void g_win32_fs_monitor_finalize (GWin32FSMonitorPrivate *monitor);