cosmetics in dbmi (client)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@39551 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/db/dbmi_client/c_openselect.c

@@ -18,10 +18,13 @@
 /*!
   \brief Open select cursor
 
+  Open modes:
+   - DB_SEQUENTIAL
+
   \param driver db driver
   \param select SQL select statement
   \param cursor db cursor to be opened
-  \param mode open mode (?)
+  \param mode open mode
 
   \return DB_OK on success
   \return DB_FAILED on failure

lib/db/dbmi_client/select.c

@@ -134,6 +134,9 @@ int db_select_int(dbDriver * driver, const char *tab, const char *col,
 
     table = db_get_cursor_table(&cursor);
     column = db_get_table_column(table, 0);	/* first column */
+    if (column == NULL) {
+	return -1;
+    }
     value = db_get_column_value(column);
     type = db_get_column_sqltype(column);
     type = db_sqltype_to_Ctype(type);