Fix bugs:

* Database creation failed
	* UsersDialog shown on new user

src/view/UsersDialog.cpp

@@ -67,7 +67,10 @@ UsersDialog::UsersDialog(KissCount* kiss, wxUI *parent) : QDialog(0, Qt::Dialog)
     _users->setFocus();
 
     if (users_list.size() == 0)
+    {
         OnNewUser();
+	throw ExceptionNewUser();
+    }
     else
         show();
 }

src/view/UsersDialog.hpp

@@ -33,6 +33,8 @@ class UsersDialog : public QDialog
 public: 
     UsersDialog(KissCount* kiss, wxUI *parent);
 
+    class ExceptionNewUser {};
+
 private slots:  
     void OnEnter();
     void OnOK();

src/view/wxUI.cpp

@@ -279,8 +279,15 @@ void wxUI::OnButtonChangeUser()
 
 void wxUI::ChangeUser()
 {
-    UsersDialog u(_kiss, this);
-    u.exec();
+    try
+    {
+	UsersDialog u(_kiss, this);
+	u.exec();
+    }
+    catch (UsersDialog::ExceptionNewUser e)
+    {
+
+    }
 }
 
 void wxUI::OnButtonAbout()