Add missing return value check in ECDSA test suite
The test case `ecdsa_det_test_vectors` from the ECDSA test suite
called `mbedtls_md()` without checking its return value.
diff --git a/tests/suites/test_suite_ecdsa.function b/tests/suites/test_suite_ecdsa.function
index 48ce586..8e76154 100644
--- a/tests/suites/test_suite_ecdsa.function
+++ b/tests/suites/test_suite_ecdsa.function
@@ -117,7 +117,8 @@
md_info = mbedtls_md_info_from_type( md_alg );
TEST_ASSERT( md_info != NULL );
hlen = mbedtls_md_get_size( md_info );
- mbedtls_md( md_info, (const unsigned char *) msg, strlen( msg ), hash );
+ TEST_ASSERT( mbedtls_md( md_info, (const unsigned char *) msg,
+ strlen( msg ), hash ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_sign_det( &grp, &r, &s, &d, hash, hlen, md_alg ) == 0 );