fix memory leaks to keep LeakSanitizer happy

unittest/libmariadb/bulk1.c

@@ -347,6 +347,8 @@ static int bulk_null(MYSQL *mysql)
   check_stmt_rc(rc, stmt);
 
   mysql_stmt_close(stmt);
+  free(buf[0]);
+  free(buf[1]);
   free(buf);
   rc= mysql_query(mysql, "DROP TABLE IF EXISTS bulk_null");
   check_mysql_rc(rc, mysql);

unittest/libmariadb/dyncol.c

@@ -55,6 +55,7 @@ static int create_dyncol_named(MYSQL *mysql)
 
   mariadb_dyncol_init(&dyncol);
   rc= mariadb_dyncol_create_many_named(&dyncol, column_count, keys1, vals, 0); 
+  mariadb_dyncol_free(&dyncol);
   FAIL_IF(mariadb_dyncol_create_many_named(&dyncol, column_count, keys1, vals, 1) < 0, "Error");
   column_count= 0;
   FAIL_IF(mariadb_dyncol_column_count(&dyncol, &column_count) < 0, "Error");
@@ -119,6 +120,7 @@ static int mdev_4994(MYSQL *unused __attribute__((unused)))
   mariadb_dyncol_init(&dyncol);
   rc= mariadb_dyncol_create_many_num(&dyncol, 1, &key, &val, 0); 
   FAIL_IF(rc < 0, "Unexpected error");
+  mariadb_dyncol_free(&dyncol);
   return OK;
 }
 
@@ -291,6 +293,8 @@ static int dyncol_nested(MYSQL *mysql __attribute__((unused)))
     diag("%s != %s", s.str, "{\"0\":17,\"1\":{\"0\":17}}");
     return FAIL;
   }
+  ma_dynstr_free(&s);
+  mariadb_dyncol_free(&col1);
   return OK;
 }
 

unittest/libmariadb/rpl_api.c

@@ -50,6 +50,7 @@ static int test_rpl_01(MYSQL *mysql)
     printf("event: %d\n", event->event_type);
   }
   mariadb_free_rpl_event(event);
+  mariadb_rpl_close(rpl);
   return OK;
 }