Fixed `unused-variable` warning on release build

skeletons/BIT_STRING.c

@@ -271,6 +271,7 @@ BIT_STRING_compare(const asn_TYPE_descriptor_t *td, const void *aptr,
     const BIT_STRING_t *b = BIT_STRING__compactify(bptr, &compact_b);
     const asn_OCTET_STRING_specifics_t *specs = td->specifics;
 
+    (void)specs;
     assert(specs && specs->subvariant == ASN_OSUBV_BIT);
 
     if(a && b) {

skeletons/OCTET_STRING.c

@@ -2199,6 +2199,7 @@ OCTET_STRING_compare(const asn_TYPE_descriptor_t *td, const void *aptr,
     const OCTET_STRING_t *a = aptr;
     const OCTET_STRING_t *b = bptr;
 
+    (void)specs;
     assert(!specs || specs->subvariant != ASN_OSUBV_BIT);
 
     if(a && b) {

skeletons/asn_random_fill.c

@@ -43,6 +43,7 @@ asn_random_between(intmax_t lb, intmax_t rb) {
         uintmax_t value = 0;
         uintmax_t got_entropy = 0;
 
+        (void)intmax_max;
         assert(RAND_MAX > 0xffffff);    /* Seen 7ffffffd! */
         assert(range < intmax_max);