Adapt uses of `mbedtls_rsa_complete` to removed PRNG argument
diff --git a/tests/suites/test_suite_pkcs1_v21.function b/tests/suites/test_suite_pkcs1_v21.function
index bd09930..50da2ff 100644
--- a/tests/suites/test_suite_pkcs1_v21.function
+++ b/tests/suites/test_suite_pkcs1_v21.function
@@ -87,7 +87,7 @@
 
     TEST_ASSERT( mbedtls_rsa_import( &ctx, &N, &P, &Q, NULL, &E ) == 0 );
     TEST_ASSERT( mbedtls_rsa_get_len( &ctx ) == (size_t) ( ( mod + 7 ) / 8 ) );
-    TEST_ASSERT( mbedtls_rsa_complete( &ctx, NULL, NULL ) == 0 );
+    TEST_ASSERT( mbedtls_rsa_complete( &ctx ) == 0 );
     TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );
 
     unhexify( message_str, message_hex_string );
@@ -143,7 +143,7 @@
 
     TEST_ASSERT( mbedtls_rsa_import( &ctx, &N, &P, &Q, NULL, &E ) == 0 );
     TEST_ASSERT( mbedtls_rsa_get_len( &ctx ) == (size_t) ( ( mod + 7 ) / 8 ) );
-    TEST_ASSERT( mbedtls_rsa_complete( &ctx, NULL, NULL ) == 0 );
+    TEST_ASSERT( mbedtls_rsa_complete( &ctx ) == 0 );
     TEST_ASSERT( mbedtls_rsa_check_privkey( &ctx ) == 0 );
 
     msg_len = unhexify( message_str, message_hex_string );