Fix missing-prototype errors in tests/suites
Signed-off-by: Michael Schuster <michael@schuster.ms>
diff --git a/tests/suites/test_suite_bignum.function b/tests/suites/test_suite_bignum.function
index f3a64e1..22a637a 100644
--- a/tests/suites/test_suite_bignum.function
+++ b/tests/suites/test_suite_bignum.function
@@ -44,7 +44,7 @@
* test) are stored in the data member of the state structure. Each number is in
* the format that mbedtls_mpi_read_string understands and is chunk_len long.
*/
-int mbedtls_test_mpi_miller_rabin_determinizer(void *state,
+static int mbedtls_test_mpi_miller_rabin_determinizer(void *state,
unsigned char *buf,
size_t len)
{