Remove num_words member from curve structure
Saves code size, and makes the curve structure simpler.
diff --git a/tinycrypt/ecc_dsa.c b/tinycrypt/ecc_dsa.c
index a3b91b8..f4af4b6 100644
--- a/tinycrypt/ecc_dsa.c
+++ b/tinycrypt/ecc_dsa.c
@@ -219,7 +219,7 @@
uECC_word_t _public[NUM_ECC_WORDS * 2];
uECC_word_t r[NUM_ECC_WORDS], s[NUM_ECC_WORDS];
- wordcount_t num_words = curve->num_words;
+ wordcount_t num_words = NUM_ECC_WORDS;
wordcount_t num_n_words = BITS_TO_WORDS(curve->num_n_bits);
if (curve != uECC_secp256r1())