a bugfix against empty paramter "user"

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2870 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/User_p.html

@@ -98,7 +98,7 @@ generic error.
 ::
 Passwords do not match.
 ::
-Username too short. Username must be >= 4 Charakters.
+Username too short. Username must be >= 4 Characters.
 #(/error)#
 <p />
 If you want to manage more Users, return to the <a href="User_p.html?change_user=true&user=#[username]#">user</a> page.

htroot/User_p.java

@@ -95,6 +95,9 @@ public class User_p {
 			if(post.containsKey("change_user")){
 	            //defaults for newuser are set above                
 		        entry=sb.userDB.getEntry((String)post.get("user"));
+		        // program crashes if a submit with emty username was made on previous mask and the user clicked on the 
+		        // link: "If you want to manage more Users, return to the user page." (parameter "user" is empty)
+                if (entry != null) {
     			    //TODO: set username read-only in html
     				prop.put("page_current_user", post.get("user"));
     	            prop.put("page_username", post.get("user"));
@@ -108,6 +111,7 @@ public class User_p {
                     prop.put("page_downloadRight", (entry.hasDownloadRight()?1:0));
                     prop.put("page_adminRight", (entry.hasAdminRight()?1:0));
                     prop.put("page_blogRight", (entry.hasBlogRight()?1:0));
+                }
 			}else if( post.containsKey("delete_user") && !((String)post.get("user")).equals("newuser") ){
 				sb.userDB.removeEntry((String)post.get("user"));
 			}