Fixed Insert not inserting when the object had no primary key.

Dapper.Contrib/SqlMapperExtensions.cs

@@ -190,8 +190,6 @@ private static string GetTableName(Type type)
 			sb.Append(") ");
 			long id = 0;
 #if POSTGRESQL
-			if (keyProperties.Count() > 0)
-			{
 			sb.Append(" RETURNING ");
 			for (var i = 0; i < keyProperties.Count(); i++)
 			{
@@ -209,7 +207,6 @@ private static string GetTableName(Type type)
 				if (id == 0)
 					id = Convert.ToInt64(value);
 			}
-			}
 #else
             connection.Execute(sb.ToString(), entityToInsert, transaction: transaction, commandTimeout: commandTimeout);
             //NOTE: would prefer to use IDENT_CURRENT('tablename') or IDENT_SCOPE but these are not available on SQLCE