[anjal] Fix a crash during sort.

[Srinivasa Ragavan <sragavan src gnome org>]

commit 45963aba2d039514f56fc76a487af615d223cb00
Author: Srinivasa Ragavan <sragavan novell com>
Date:   Thu Mar 19 15:58:57 2009 +0530

    Fix a crash during sort.
---
 src/em-tree-store.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/em-tree-store.c b/src/em-tree-store.c
index 108e639..7669df5 100644
--- a/src/em-tree-store.c
+++ b/src/em-tree-store.c
@@ -315,10 +315,10 @@ emts_get_value(GtkTreeModel *tree_model, GtkTreeIter  *iter, gint column, GValue
 			break;			 
 		}
 		case EMTS_COL_THREADPREVIEW:{
-			 EMTreeNode *lnode = g_hash_table_lookup(f->uid_table, node->latest_uid);
+			 EMTreeNode *lnode = node->latest_uid ? g_hash_table_lookup(f->uid_table, node->latest_uid) : NULL;
 			 char *preview = NULL;
 			 char *str = NULL;
-
+			 /* We don't bother to fetch the preview of latest message, if not idenfied. Its ok.*/
 			 if (lnode && lnode->info)
 				 preview = camel_message_info_preview (lnode->info);
 			 if ((!preview || !*preview )&& node->info)
@@ -330,8 +330,7 @@ emts_get_value(GtkTreeModel *tree_model, GtkTreeIter  *iter, gint column, GValue
 			 break;
 		}
 		case EMTS_COL_FLAGS: {
-			 EMTreeNode *lnode = g_hash_table_lookup(f->uid_table, node->latest_uid);
-			 g_value_set_uint(value, (unsigned int)camel_message_info_flags(lnode->info));
+			 g_value_set_uint(value, (unsigned int)camel_message_info_flags(node->info));
 			 break;
 		}
 		case EMTS_COL_DATE: {