Bug#16143 mysql_stmt_sqlstate returns an empty string instead of '00000'

 - Init sql_state in mysql_stmt_init


libmysql/libmysql.c:
  Init sql_state to not_error_sql_state in mysql_init
tests/mysql_client_test.c:
  Add test for mysql_stmt_sqlstate after mysql_stmt_init

libmysql/libmysql.c

@@ -2008,6 +2008,7 @@ mysql_stmt_init(MYSQL *mysql)
   stmt->mysql= mysql;
   stmt->read_row_func= stmt_read_row_no_result_set;
   stmt->prefetch_rows= DEFAULT_PREFETCH_ROWS;
+  strmov(stmt->sqlstate, not_error_sqlstate);
   /* The rest of statement members was bzeroed inside malloc */
 
   DBUG_RETURN(stmt);

tests/mysql_client_test.c

@@ -14729,6 +14729,21 @@ static void test_bug12744()
   client_connect(0);
 }
 
+/* Bug #16143: mysql_stmt_sqlstate returns an empty string instead of '00000' */
+
+static void test_bug16143()
+{
+  MYSQL_STMT *stmt;
+  myheader("test_bug16143");
+
+  stmt= mysql_stmt_init(mysql);
+  /* Check mysql_stmt_sqlstate return "no error" */
+  DIE_UNLESS(strcmp(mysql_stmt_sqlstate(stmt), "00000") == 0);
+
+  mysql_stmt_close(stmt);
+}
+
+
 /* Bug #16144: mysql_stmt_attr_get type error */
 
 static void test_bug16144()
@@ -15073,6 +15088,7 @@ static struct my_tests_st my_tests[]= {
   { "test_bug15510", test_bug15510 },
   { "test_opt_reconnect", test_opt_reconnect },
   { "test_bug12744", test_bug12744 },
+  { "test_bug16143", test_bug16143 },
   { "test_bug16144", test_bug16144 },
   { "test_bug15613", test_bug15613 },
   { 0, 0 }