Fix CONPY-283: Incorrect result format after cursor.scroll()

Since unsigned long is 32-bit under windows, row_number must
be defined as uint64_t, since we assign 64-bit values directly
from python code.

Author: 9EOR9

include/mariadb_python.h

@@ -290,7 +290,7 @@ typedef struct {
     uint32_t field_count;
     int64_t row_count;
     uint64_t lastrow_id;
-    unsigned long row_number;
+    uint64_t row_number;
     enum enum_result_format result_format;
     uint8_t is_prepared;
     char is_buffered;

testing/test/integration/test_cursor.py

@@ -40,6 +40,24 @@ def test_multiple_close(self):
         cursor.close()
         del cursor
 
+    def test_conpy283(self):
+        conn= create_connection()
+        cursor= conn.cursor(dictionary=True)
+        self.assertEqual(cursor._resulttype, 2)
+        cursor.execute("select 1 as A union SELECT 2 as A")
+        row= cursor.fetchone()
+        self.assertEqual(row, {'A' : 1})
+        self.assertEqual(cursor._resulttype, 2)
+        cursor.scroll(-1)
+        self.assertEqual(cursor._resulttype, 2)
+        row= cursor.fetchone()
+        self.assertEqual(row, {'A' : 1})
+        row= cursor.fetchone()
+        self.assertEqual(row, {'A' : 2})
+        self.assertEqual(cursor._resulttype, 2)
+        cursor.close()
+        conn.close()
+
     def test_date(self):
         v = self.connection.server_version
         i = self.connection.server_info.lower()