Adapt EC-JPAKE test suite to hardcodable hash
diff --git a/tests/suites/test_suite_ecjpake.function b/tests/suites/test_suite_ecjpake.function
index 38f190d..fefd160 100644
--- a/tests/suites/test_suite_ecjpake.function
+++ b/tests/suites/test_suite_ecjpake.function
@@ -247,7 +247,7 @@
     mbedtls_ecjpake_init( &corrupt_ctx );
     TEST_ASSERT( mbedtls_ecjpake_setup( &corrupt_ctx, any_role,
                  MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, pw_len ) == 0 );
-    corrupt_ctx.md_info = NULL;
+    corrupt_ctx.md_info = MBEDTLS_MD_INVALID_HANDLE;
 
     TEST_ASSERT( mbedtls_ecjpake_read_round_one( &corrupt_ctx, msg->x,
                  msg->len ) == MBEDTLS_ERR_MD_BAD_INPUT_DATA );