avoid uninitialized memory read

/* crypto/md32_common.h */

/* ====================================================================

 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.

 * Copyright (c) 1999-2002 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

				{

				ew=(c->num>>2);

				ec=(c->num&0x03);

				l=p[sw]; HOST_p_c2l(data,l,sc); p[sw++]=l;

				if (sc)

					l=p[sw];

				HOST_p_c2l(data,l,sc);

				p[sw++]=l;

				for (; sw < ew; sw++)

					{

					HOST_c2l(data,l); p[sw]=l;