Change requested in ODBC-152 - SQL_DATA_TYPE value

casted to SIGNED in SQLColumns query. Other wise its type(returned by
server) is MEDIUM_BLOB. Even though at the moment it's not quite clear
what is the problem, the change looks reasonable.

ma_statement.h

@@ -249,13 +249,13 @@ SQLRETURN    MADB_DoExecute         (MADB_Stmt *Stmt, BOOL ExecDirect);
   "NUMERIC_SCALE DECIMAL_DIGITS, 10 NUM_PREC_RADIX,"\
   XSTR(SQL_NULLABLE_UNKNOWN) " NULLABLE,"\
   "NULL REMARKS, NULL COLUMN_DEF,"\
-  "CASE"\
+  "CAST(CASE"\
   "  WHEN DATA_TYPE = 'date' THEN " XSTR(SQL_DATE)\
   "  WHEN DATA_TYPE = 'time' THEN " XSTR(SQL_TIME)\
   "  WHEN DATA_TYPE = 'datetime' THEN " XSTR(SQL_DATETIME)\
   "  WHEN DATA_TYPE = 'timestamp' THEN " XSTR(SQL_TIMESTAMP)\
   " ELSE @dt "\
-  "END AS SQL_DATA_TYPE, NULL SQL_DATETIME_SUB,"\
+  "END AS SIGNED) AS SQL_DATA_TYPE, NULL SQL_DATETIME_SUB,"\
   "CHARACTER_OCTET_LENGTH CHAR_OCTET_LENGTH, "\
   "ORDINAL_POSITION, 'YES' IS_NULLABLE FROM INFORMATION_SCHEMA.PARAMETERS "