[PATCH 2/3] tests/qtest/fdc-test: skip test cases when the 'pc' machine is missing

run_isolated() starts every test case in fdc_tests[] with "-machine pc".
A QEMU built without the i440fx/pc machine fails them with "unsupported
machine type 'pc'" rather than skipping them.

Check for the machine in run_isolated() and skip there.  The previous
patch routed every table entry through that one function, so one check
covers all of them; 4e37f749dd ("tests/qtest/drive_del-test: skip pc
tests when 'pc' machine is unavailable") needed the same three lines
four times over.

The two CVE test cases are left alone.  They start QEMU without
-machine and so ask for the default machine, which is a separate
question from the one this patch answers.

Signed-off-by: Christian Quante <[email protected]>
---
 tests/qtest/fdc-test.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/qtest/fdc-test.c b/tests/qtest/fdc-test.c
index fd38475bf7..f480f4ba09 100644
--- a/tests/qtest/fdc-test.c
+++ b/tests/qtest/fdc-test.c
@@ -690,6 +690,11 @@ static void run_isolated(const void *data)
 {
     const FDCTest *test = data;
 
+    if (!qtest_has_machine("pc")) {
+        g_test_skip("Machine 'pc' is not available");
+        return;
+    }
+
     qtest_start("-machine pc -device floppy,id=floppy0");
     qtest_irq_intercept_in(global_qtest, "ioapic");
 
-- 
2.53.0