don't use variable length or zero-length arrays in test files

as some compilers don't handle that

1 files changed, 4 insertions, 2 deletions

diff --git a/tests/test_olm_sha256.cpp b/tests/test_olm_sha256.cpp
index c6d0242..d76e592 100644
--- a/tests/test_olm_sha256.cpp
+++ b/tests/test_olm_sha256.cpp
@@ -1,13 +1,15 @@
 #include "olm/olm.h"
 #include "unittest.hh"
 
+#include <vector>
+
 int main() {
 {
 TestCase("Olm sha256 test");
 
 
-std::uint8_t utility_buffer[::olm_utility_size()];
-::OlmUtility * utility = ::olm_utility(utility_buffer);
+std::vector<std::uint8_t> utility_buffer(::olm_utility_size());
+::OlmUtility * utility = ::olm_utility(utility_buffer.data());
 
 assert_equals(std::size_t(43), ::olm_sha256_length(utility));
 std::uint8_t output[43];