SKALE-1880-fix-warnings

secure_enclave/DomainParameters.c

@@ -94,6 +94,10 @@ void domain_parameters_set_hex(domain_parameters curve, char* name, char* p, cha
 /*Release memory*/
 void domain_parameters_clear(domain_parameters curve)
 {
+
+    if (!curve)
+        return;
+
 	mpz_clear(curve->p);
 	mpz_clear(curve->a);
 	mpz_clear(curve->b);

secure_enclave/Point.c

@@ -382,6 +382,8 @@ char* point_compress(point P)
 /*Release point*/
 void point_clear(point p)
 {
+    if (!p)
+        return;
 	mpz_clear(p->x);
 	mpz_clear(p->y);
 	free(p);

secure_enclave/Signature.c

@@ -179,6 +179,8 @@ void signature_sign(signature sig, mpz_t message, mpz_t private_key, domain_para
 
 /*Release signature*/
 void signature_free(signature sig) {
+    if (!sig)
+        return;
     mpz_clear(sig->r);
     mpz_clear(sig->s);
     free(sig);