[gnome-commander] Use new GMutex API, fixes deprecated-declarations warning

[Uwe Scholz <uwescholz src gnome org>]

commit 8c2472b21212f11357e780bbb600e3ee22d2dc1b
Author: Uwe Scholz <uwescholz src gnome org>
Date:   Sun Apr 16 20:18:54 2017 +0200

    Use new GMutex API, fixes deprecated-declarations warning

 src/dialogs/gnome-cmd-search-dialog.cc |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/dialogs/gnome-cmd-search-dialog.cc b/src/dialogs/gnome-cmd-search-dialog.cc
index d6483c4..765ec1c 100644
--- a/src/dialogs/gnome-cmd-search-dialog.cc
+++ b/src/dialogs/gnome-cmd-search-dialog.cc
@@ -566,7 +566,7 @@ gboolean SearchData::join_thread_func (SearchData *data)
         g_thread_join (data->thread);
 
     if (data->pdata.mutex)
-        g_mutex_free (data->pdata.mutex);
+        g_mutex_clear (data->pdata.mutex);
 
     return FALSE;
 }
@@ -585,9 +585,9 @@ gboolean SearchData::start_generic_search()
     }
 
     if (!pdata.mutex)
-        pdata.mutex = g_mutex_new ();
+        g_mutex_init(pdata.mutex);
 
-    thread = g_thread_create ((GThreadFunc) perform_search_operation, this, TRUE, NULL);
+    thread = g_thread_new (NULL, (GThreadFunc) perform_search_operation, this);
 
     return TRUE;
 }