Update core_results.cpp

source/shared/core_results.cpp

@@ -911,6 +911,7 @@ SQLLEN sqlsrv_buffered_result_set::row_count( TSRMLS_D )
 		return zend_hash_num_elements( cache );
 	}
 	else {
+		// returning -1 to represent getting the rowcount of an empty result set
 		return -1;
 	}
 }