Possibly-uninit variable in pem_lib.c.

Can't really happen, but the flow of control isn't obvious. Add an
initializer.

(Imported from upstream's fa2ae04c40510262d198131c758acd8aa5a9b4ce)

Change-Id: If393687bca9f505b825feffaf2a63895a0ea5b6a

crypto/pem/pem_lib.c

@@ -390,7 +390,7 @@ err:
 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
 	     pem_password_cb *callback,void *u)
 	{
-	int i,j,o,klen;
+	int i=0,j,o,klen;
 	long len;
 	EVP_CIPHER_CTX ctx;
 	unsigned char key[EVP_MAX_KEY_LENGTH];