Fix #210 - Incorrect variable for calc_batch_size

Author: rlshuhart

dbt/include/sqlserver/macros/materializations/seeds/helpers.sql

@@ -59,7 +59,7 @@
 
 {% macro sqlserver__load_csv_rows(model, agate_table) %}
   {% set max_batch_size = get_batch_size() %}
-  {% set cols_sql = get_seed_column_quoted_csv(model, agate_table.column_names) %}
+  {% set cols_sql = agate_table.column_names %}
   {% set batch_size = calc_batch_size(cols_sql|length, max_batch_size) %}
 
   {{ return(basic_load_csv_rows(model, batch_size, agate_table) )}}