Add compatibility for GTK 2.18

With 2.18 some functions are deprecated. With geeqie that are two at the
moment.
- gtk_tree_view_column_get_cell_renderers - which can be replaced by
  gtk_cell_layout_get_cells
- gdk_event_get_graphics_expose - I just commented it as there seems to
  be no replacement in GTK 2.18

src/collect-table.c

@@ -1701,7 +1701,11 @@ static void collection_table_populate(CollectTable *ct, gboolean resize)
 			gtk_tree_view_column_set_visible(column, (i < ct->columns));
 			gtk_tree_view_column_set_fixed_width(column, thumb_width + (THUMB_BORDER_PADDING * 6));
 
+#if GTK_CHECK_VERSION(2,18,0)
+			list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(column));
+#else
 			list = gtk_tree_view_column_get_cell_renderers(column);
+#endif
 			cell = (list) ? list->data : NULL;
 			g_list_free(list);
 

src/dupe.c

@@ -2769,7 +2769,11 @@ static void dupe_listview_set_height(GtkWidget *listview, gboolean thumb)
 
 	gtk_tree_view_column_set_fixed_width(column, (thumb) ? options->thumbnails.max_width : 4);
 
+#if GTK_CHECK_VERSION(2,18,0)
+	list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(column));
+#else
 	list = gtk_tree_view_column_get_cell_renderers(column);
+#endif
 	if (!list) return;
 	cell = list->data;
 	g_list_free(list);

src/pixbuf-renderer.c

@@ -3682,6 +3682,7 @@ void pixbuf_renderer_scroll(PixbufRenderer *pr, gint x, gint y)
 			}
 
 		/* process exposures here, "expose_event" seems to miss a few with obstructed windows */
+#if ! GTK_CHECK_VERSION(2,18,0)
 		while ((event = gdk_event_get_graphics_expose(box->window)) != NULL)
 			{
 			pixbuf_renderer_paint(pr, &event->expose.area);
@@ -3693,6 +3694,7 @@ void pixbuf_renderer_scroll(PixbufRenderer *pr, gint x, gint y)
 				}
 			gdk_event_free(event);
 			}
+#endif
 		}
 }
 

src/search.c

@@ -824,7 +824,11 @@ static void search_result_thumb_height(SearchData *sd)
 
 	gtk_tree_view_column_set_fixed_width(column, (sd->thumb_enable) ? options->thumbnails.max_width : 4);
 
+#if GTK_CHECK_VERSION(2,18,0)
+	list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(column));
+#else
 	list = gtk_tree_view_column_get_cell_renderers(column);
+#endif
 	if (!list) return;
 	cell = list->data;
 	g_list_free(list);

src/ui_tree_edit.c

@@ -189,7 +189,11 @@ gboolean tree_edit_by_path(GtkTreeView *tree, GtkTreePath *tpath, gint column, c
 	tcolumn = gtk_tree_view_get_column(tree, column);
 	if (!tcolumn) return FALSE;
 
+#if GTK_CHECK_VERSION(2,18,0)
+	list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(tcolumn));
+#else
 	list = gtk_tree_view_column_get_cell_renderers(tcolumn);
+#endif
 	work = list;
 	while (work && !cell)
 		{
@@ -289,7 +293,11 @@ gboolean tree_view_get_cell_origin(GtkTreeView *widget, GtkTreePath *tpath, gint
 		gint cell_x;
 		gint cell_width;
 
+#if GTK_CHECK_VERSION(2,18,0)
+		renderers = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(tv_column));
+#else
 		renderers = gtk_tree_view_column_get_cell_renderers(tv_column);
+#endif
 		work = renderers;
 		while (work && !cell)
 			{

src/view_file_icon.c

@@ -1636,7 +1636,11 @@ static void vficon_populate(ViewFile *vf, gboolean resize, gboolean keep_positio
 			gtk_tree_view_column_set_visible(column, (i < VFICON(vf)->columns));
 			gtk_tree_view_column_set_fixed_width(column, thumb_width + (THUMB_BORDER_PADDING * 6));
 
+#if GTK_CHECK_VERSION(2,18,0)
+			list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(column));
+#else
 			list = gtk_tree_view_column_get_cell_renderers(column);
+#endif
 			cell = (list) ? list->data : NULL;
 			g_list_free(list);
 

src/view_file_list.c

@@ -1701,7 +1701,11 @@ static void vflist_listview_set_columns(GtkWidget *listview, gboolean thumb, gbo
 
 	gtk_tree_view_column_set_fixed_width(column, options->thumbnails.max_width + 4);
 
+#if GTK_CHECK_VERSION(2,18,0)
+	list = gtk_cell_layout_get_cells(GTK_CELL_LAYOUT(column));
+#else
 	list = gtk_tree_view_column_get_cell_renderers(column);
+#endif
 	if (!list) return;
 	cell = list->data;
 	g_list_free(list);