fixing syntax - adjustment to schnorr examples

examples/ecdh.c

@@ -51,6 +51,7 @@ int main(void) {
         return 1;
     }
     if (!secp256k1_ec_seckey_verify(ctx, seckey1) || !secp256k1_ec_seckey_verify(ctx, seckey2)) {
+        printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
         return 1;
     }
 

examples/ecdsa.c

@@ -58,6 +58,7 @@ int main(void) {
         return 1;
     }
     if (!secp256k1_ec_seckey_verify(ctx, seckey)) {
+        printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
         return 1;
     }
 

examples/ellswift.c

@@ -56,7 +56,7 @@ int main(void) {
         return 1;
     }
     if (!secp256k1_ec_seckey_verify(ctx, seckey1) || !secp256k1_ec_seckey_verify(ctx, seckey2)) {
-        printf("Generated secret key is invalid. This could indicate an issue with the random number generator.\n")
+        printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
         return 1;
     }
 

examples/schnorr.c

@@ -45,18 +45,17 @@ 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. */
-    while (1) {
-        if (!fill_random(seckey, sizeof(seckey))) {
-            printf("Failed to generate randomness\n");
-            return 1;
-        }
-        /* Try to create a keypair with a valid context, it should only fail if
-         * the secret key is zero or out of range. */
-        if (secp256k1_keypair_create(ctx, &keypair, seckey)) {
-            break;
-        }
+     * order), we return 1. Note that the probability of this
+     * happening is negligible, though it could indicate a faulty RNG */
+    if (!fill_random(seckey, sizeof(seckey))) {
+        printf("Failed to generate randomness\n");
+        return 1;
+    }
+    /* Try to create a keypair with a valid context, it should only fail if
+     * the secret key is zero or out of range. */
+    if (secp256k1_keypair_create(ctx, &keypair, seckey)) {
+        printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
+	return 1;
     }
 
     /* Extract the X-only public key from the keypair. We pass NULL for