Don't set display to null if length is 0.

modules_k/uac/uac.c

@@ -435,15 +435,15 @@ static int fixup_replace_disp_uri(void** param, int param_no)
 			s.len += 2;
 		}
 	}
-	if(s.len!=0)
-	{
+//	if(s.len!=0)
+//	{
 		if(pv_parse_format(&s ,&model)<0)
 		{
 			LM_ERR("wrong format [%s] for param no %d!\n", s.s, param_no);
 			pkg_free(s.s);
 			return E_UNSPEC;
 		}
-	}
+//	}
 	*param = (void*)model;
 
 	return 0;