Complementary fix for bug #29353: inserting a negative value to a csv table

leads to the table corruption

New Field::store() method implemented to explicitly set thd->count_cuted_fields
before value storing, instead of (incorrectly) setting it in the CSV storage engine.
Thread row counter now properly incremented during check and repair in the CSV engine.

sql/mysql_priv.h

@@ -494,6 +494,13 @@ enum enum_parsing_place
 struct st_table;
 class THD;
 
+enum enum_check_fields
+{
+  CHECK_FIELD_IGNORE,
+  CHECK_FIELD_WARN,
+  CHECK_FIELD_ERROR_FOR_NULL
+};
+                                  
 /* Struct to handle simple linked lists */
 
 typedef struct st_sql_list {