Remove unnecessary assert in PK11MessageDigest.c

This ASSERT_OUTOFMEM(env) is incorrect for two reasons:

 1. When JSS_RefByteArray detects a zero-length result, it returns
    false but doesn't throw an exception. It is up to the caller to
    handle that as they wish. In our case, we can safely skip the
    PK11_DigestOp call.
 2. When length < offset+len (and JSS_RefByteArray exits
    successfully), we won't have thrown an exception.

This only shows up in debug builds; release builds aren't affected.

Signed-off-by: Alexander Scheel <[email protected]>

org/mozilla/jss/pkcs11/PK11MessageDigest.c

@@ -120,7 +120,6 @@ Java_org_mozilla_jss_pkcs11_PK11MessageDigest_update
 
     if (!JSS_RefByteArray(env, inbufBA, &bytes, &length) ||
             length < offset+len) {
-        ASSERT_OUTOFMEM(env);
         goto finish;
     }