[evolution] EHTMLEditorView - Crash in selection_is_in_table function

[Tomas Popela <tpopela src gnome org>]

commit da074351455c7f5d1db3370642ddc178f6e5e000
Author: Tomas Popela <tpopela redhat com>
Date:   Mon Mar 9 11:21:22 2015 +0100

    EHTMLEditorView - Crash in selection_is_in_table function
    
    Check if the passed variable is not NULL before working with it.

 e-util/e-html-editor-view.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/e-util/e-html-editor-view.c b/e-util/e-html-editor-view.c
index e05bbf6..2513e7e 100644
--- a/e-util/e-html-editor-view.c
+++ b/e-util/e-html-editor-view.c
@@ -3157,11 +3157,15 @@ selection_is_in_table (WebKitDOMDocument *document,
                        }
                }
                if (WEBKIT_DOM_IS_HTML_TABLE_ELEMENT (parent)) {
-                       *table_node = parent;
+                       if (table_node != NULL)
+                               *table_node = parent;
                }
                parent = webkit_dom_node_get_parent_node (parent);
        }
 
+       if (table_node == NULL)
+               return FALSE;
+
        return *table_node != NULL;
 }