Fix potential NPE in git commit search

James Moger

2013-09-23 36491b1c8bb52262fbf276e3a1f5951fde5c091d

 src/main/java/com/gitblit/models/UserPreferences.java

@@ -37,6 +37,8 @@

   public final String username;

   public String locale;
	
   private final Map<String, UserRepositoryPreferences> repositoryPreferences = new TreeMap<String, UserRepositoryPreferences>();

   public UserPreferences(String username) {