If the input 'bn' is NULL then BN_bin2bn() will allocate and
return a BIGNUM which will then be leaked. BN_set_word()
would then return true even though it didn't set the word
into a BIGNUM known to the caller.
Change-Id: I6681f548e6bfb330cec009ae7c18e6151016179e
All source files in lib/hcrypto should be built the same way.
Since this source directory is dependent on libroken then all source
files must be built using the roken.h declarations and included headers.
Also, there is no config.h in the local directory so angle brackets
include of quotes should be used.
Finally, because roken.h includes stdio.h, stdlib.h, stdarg.h, limits.h,
strings.h, sys/types.h, etc., do not include them separately.
Start all source files with
#include <config.h>
#include <roken.h>
Change-Id: I09ab47f8a5472018efe6c8b59a0e51fde8f24724
