tests: add a test to exercise just-fixed code

* tests/print-max.c: Extend to provide coverage of
ped_disk_get_max_supported_partition_count, too.
* tests/t9021-maxima.sh (max_n_partitions): New function, with
naively hard-coded max-number-of-partitions-per-partition-table-type
values.
Use it to ensure that each expected value matches the actual one.
* cfg.mk: Exempt this test's use of error from the syntax-check
for unmarked diagnostics.

1 files changed, 2 insertions, 0 deletions

diff --git a/cfg.mk b/cfg.mk
index c6a00c8..45d2ac2 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -69,3 +69,5 @@ exclude_file_name_regexp--sc_prohibit_always-defined_macros = \
 
 exclude_file_name_regexp--sc_prohibit_path_max_allocation = \
   ^libparted/arch/beos\.c$$
+
+exclude_file_name_regexp--sc_unmarked_diagnostics = ^tests/print-max\.c$$