core: fix memory leak in case of error when building content of bar item for display

ChangeLog

@@ -7,6 +7,8 @@ v0.4.0-dev, 2012-12-25
 Version 0.4.0 (under dev!)
 --------------------------
 
+* core: fix memory leak in case of error when building content of bar item for
+  display
 * core: fix detection of command in input: a single command char is considered
   as a command (API function "string_input_for_bufer")
 * core: search for a fallback template when a no template is matching command

src/gui/gui-bar-window.c

@@ -852,6 +852,7 @@ gui_bar_window_content_get_with_filling (struct t_gui_bar_window *bar_window,
                 {
                     if (content)
                         free (content);
+                    free (split_items);
                     return NULL;
                 }
                 content = content2;