mpiutil: Fix NULL pointer dereference in case of failed alloc

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>

diff --git a/VasEBoot-core/lib/libgcrypt/mpi/mpiutil.c b/VasEBoot-core/lib/libgcrypt/mpi/mpiutil.c
index 3a372374f..dc53db09d 100644
--- a/VasEBoot-core/lib/libgcrypt-VasEBoot/mpi/mpiutil.c
+++ b/VasEBoot-core/lib/libgcrypt-VasEBoot/mpi/mpiutil.c
@@ -432,6 +432,9 @@ _gcry_mpi_alloc_like( gcry_mpi_t a )
 	int n = (a->sign+7)/8;
 	void *p = _gcry_is_secure(a->d)? xtrymalloc_secure (n)
                                        : xtrymalloc (n);
+	if ( !p ) {
+            _gcry_fatal_error (GPG_ERR_ENOMEM, NULL);
+	}
 	memcpy( p, a->d, n );
 	b = mpi_set_opaque( NULL, p, a->sign );
     }