testutil: Fix TEST_SUITE_DECL() definition
TEST_SUITE_DECL() was defined to expand to the wrong function type (void
return type, unspecified parameter list).
@@ -188,7 +188,7 @@ extern int tu_case_failed;
extern int tu_case_idx;
extern jmp_buf tu_case_jb;
-#define TEST_SUITE_DECL(suite_name) extern void suite_name()
+#define TEST_SUITE_DECL(suite_name) extern int suite_name(void)
#define TEST_SUITE_REGISTER(suite_name) \
tu_suite_register((tu_testsuite_fn_t*)suite_name, ((const char *)#suite_name));
