Fixed advanced inistallation page partition creation

source/ubinstall-gtk-advanced.c

@@ -191,9 +191,10 @@ void yon_advanced_update(main_window *widgets){
 }
 
 void on_advanced_partition_create(GtkWidget *, main_window *widgets){
-    GtkTreeIter iter, *last_unvalid = NULL;
     int found = 0;
-    for_iter(GTK_TREE_MODEL(widgets->DevicesList),&iter){
+    GtkTreeIter iter, *last_unvalid = NULL;
+    GtkTreeModel *model;
+    if (gtk_tree_selection_get_selected(gtk_tree_view_get_selection(GTK_TREE_VIEW(widgets->AdvancedDeviceTree)),&model,&iter)){
         char *target;
         int active;
         gtk_tree_model_get(GTK_TREE_MODEL(widgets->DevicesList),&iter,0,&target,5,&active,-1);
@@ -202,16 +203,16 @@ void on_advanced_partition_create(GtkWidget *, main_window *widgets){
                 last_unvalid = gtk_tree_iter_copy(&iter);
             } else {
                 found=1;
-                if (sections_size==2) break;
+                if (sections_size==2) return;
                 advanced_section *section = yon_advanced_section_new();
                 section->part_source = PART_SOURCE_DEVICE;
                 section->device = target;
                 section->partition = NULL;
                 sections[sections_size]=section;
                 sections_size++;
-                break;
             }
         }
+
     }
     if (!found&&last_unvalid){
         char *target;