Fix valgrind warning in ECDSA test suite.
diff --git a/tests/suites/test_suite_ecdsa.function b/tests/suites/test_suite_ecdsa.function
index 89f9979..d5b21d4 100644
--- a/tests/suites/test_suite_ecdsa.function
+++ b/tests/suites/test_suite_ecdsa.function
@@ -19,6 +19,7 @@
ecp_point_init( &Q );
mpi_init( &d ); mpi_init( &r ); mpi_init( &s );
memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
+ memset( buf, 0, sizeof( buf ) );
/* prepare material for signature */
TEST_ASSERT( rnd_pseudo_rand( &rnd_info, buf, sizeof( buf ) ) == 0 );
@@ -49,6 +50,7 @@
ecp_point_init( &Q );
mpi_init( &d ); mpi_init( &r ); mpi_init( &s );
mpi_init( &r_check ); mpi_init( &s_check );
+ memset( buf, 0, sizeof( buf ) );
TEST_ASSERT( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_{id} ) == 0 );
TEST_ASSERT( ecp_point_read_string( &Q, 16, "{xQ}", "{yQ}" ) == 0 );