[gtranslator] Fix gtksourceview header warning

[Alexandre Franke <afranke src gnome org>]

commit 4fa705d554a5d63f70c2e4c19b0d321af5bb7b42
Author: Alexandre Franke <alexandre franke gmail com>
Date:   Sun Dec 4 23:13:50 2016 +0100

    Fix gtksourceview header warning
    
    Only gtksource.h should be included directly.

 src/gtr-preferences-dialog.c |    2 +-
 src/gtr-view.c               |    5 +----
 src/gtr-view.h               |    2 +-
 3 files changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/src/gtr-preferences-dialog.c b/src/gtr-preferences-dialog.c
index c16911e..611c93c 100644
--- a/src/gtr-preferences-dialog.c
+++ b/src/gtr-preferences-dialog.c
@@ -42,7 +42,7 @@
 #include <gio/gio.h>
 #include <gtk/gtk.h>
 #include <string.h>
-#include <gtksourceview/gtksourcestyleschememanager.h>
+#include <gtksourceview/gtksource.h>
 
 #define GTR_PREFERENCES_DIALOG_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ( \
                                                     (object), \
diff --git a/src/gtr-view.c b/src/gtr-view.c
index 451b139..eaf2e71 100644
--- a/src/gtr-view.c
+++ b/src/gtr-view.c
@@ -39,10 +39,7 @@
 #include <glib-object.h>
 #include <gtk/gtk.h>
 
-#include <gtksourceview/gtksourcelanguagemanager.h>
-#include <gtksourceview/gtksourcebuffer.h>
-#include <gtksourceview/gtksourcestyleschememanager.h>
-
+#include <gtksourceview/gtksource.h>
 #ifdef HAVE_GTKSPELL
 #include <gtkspell/gtkspell.h>
 #endif
diff --git a/src/gtr-view.h b/src/gtr-view.h
index 70bc26b..8cd40be 100644
--- a/src/gtr-view.h
+++ b/src/gtr-view.h
@@ -22,7 +22,7 @@
 #include <glib.h>
 #include <glib-object.h>
 #include <gtk/gtk.h>
-#include <gtksourceview/gtksourceview.h>
+#include <gtksourceview/gtksource.h>
 
 G_BEGIN_DECLS
 /*