Switch recursion to iteration Sql Append (#98)

Author: SkiTee3000

src/Database/Sql.cs

@@ -74,18 +74,17 @@ private void Build()
 
         public Sql Append(Sql sql)
         {
-            if (_rhs != null)
+            Sql last = this;
+            while (last._rhs != null)
             {
-                _rhs.Append(sql);
-            }
-            else
-            {
-                _rhs = sql;
+                last = last._rhs;
             }
+            last._rhs = sql;
 
             return this;
         }
 
+
         public Sql Append(string sql, params object[] args)
         {
             return Append(new Sql(sql, args));