improving examples #3: changing comments

Author: Cheapshot003

examples/ecdh.c

@@ -44,8 +44,8 @@ int main(void) {
     /*** Key Generation ***/
 
     /* If the secret key is zero or out of range (bigger than secp256k1's
-     * order), we try to sample a new key. Note that the probability of this
-     * happening is negligible. */
+     * order), we return 1. Note that the probability of this
+     * happening is negligible, though it could indicate a faulty RNG */
     if (!fill_random(seckey1, sizeof(seckey1)) || !fill_random(seckey2, sizeof(seckey2))) {
         printf("Failed to generate randomness\n");
         return 1;