Fix build error when int32_t is not int

Fix a pointer mismatch when int32_t is not int, for example on Cortex-M where
in32_t is long int. Fix #4530

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/ChangeLog.d/host_test-int32.txt b/ChangeLog.d/host_test-int32.txt
new file mode 100644
index 0000000..60ef8e9
--- /dev/null
+++ b/ChangeLog.d/host_test-int32.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * Fix test suite code on platforms where int32_t is not int, such as
+     Arm Cortex-M. Fixes #4530.