Fixed a bug where logging in/out would cause a blank page display.

docs/changelog/7.x.x.txt

@@ -2,6 +2,7 @@
  - Added server side spellchecker (Martin Kamerbeek / Procolix)
  - Added configurable sales tax. (Tiffany Patterson / Elite Marketing)
  - change: made Text::Aspell optional, nullifying spellchecker if not present
+ - Fixed a bug where logging in/out would cause a blank page display.
 
 7.1.2
  - Fixed a bug that caused workflows to fail if collaboration systems and

lib/WebGUI/Auth.pm

@@ -587,7 +587,7 @@ sub login {
        $self->session->errorHandler->warn($error) if $error;
     }
    
-	return "";
+	return undef;
 }
 
 #-------------------------------------------------------------------
@@ -613,7 +613,7 @@ sub logout {
        $self->session->errorHandler->warn($error) if $error;
     }
    
-	return "";
+	return undef;
 }
 
 #-------------------------------------------------------------------