tests: Assert success of calls to mbedtls_rsa_set_padding()

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/suites/test_suite_pkcs1_v15.function b/tests/suites/test_suite_pkcs1_v15.function
index d558c38..d78ee88 100644
--- a/tests/suites/test_suite_pkcs1_v15.function
+++ b/tests/suites/test_suite_pkcs1_v15.function
@@ -26,7 +26,8 @@
 
     mbedtls_mpi_init( &N ); mbedtls_mpi_init( &E );
     mbedtls_rsa_init( &ctx );
-    mbedtls_rsa_set_padding( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
+    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
+                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );
     memset( output, 0x00, sizeof( output ) );
 
     TEST_ASSERT( mbedtls_mpi_read_string( &N, radix_N, input_N ) == 0 );
@@ -73,7 +74,8 @@
     mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P );
     mbedtls_mpi_init( &Q ); mbedtls_mpi_init( &E );
     mbedtls_rsa_init( &ctx );
-    mbedtls_rsa_set_padding( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
+    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
+                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );
 
     memset( output, 0x00, sizeof( output ) );
     memset( &rnd_info, 0, sizeof( mbedtls_test_rnd_pseudo_info ) );
@@ -280,7 +282,8 @@
     mbedtls_mpi_init( &N ); mbedtls_mpi_init( &P );
     mbedtls_mpi_init( &Q ); mbedtls_mpi_init( &E );
     mbedtls_rsa_init( &ctx );
-    mbedtls_rsa_set_padding( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
+    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
+                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );
 
     memset( hash_result, 0x00, sizeof( hash_result ) );
     memset( output, 0x00, sizeof( output ) );
@@ -329,7 +332,8 @@
 
     mbedtls_mpi_init( &N ); mbedtls_mpi_init( &E );
     mbedtls_rsa_init( &ctx );
-    mbedtls_rsa_set_padding( &ctx, MBEDTLS_RSA_PKCS_V15, hash );
+    TEST_ASSERT( mbedtls_rsa_set_padding( &ctx,
+                                          MBEDTLS_RSA_PKCS_V15, hash ) == 0 );
     memset( hash_result, 0x00, sizeof( hash_result ) );
 
     TEST_ASSERT( mbedtls_mpi_read_string( &N, radix_N, input_N ) == 0 );