Allow for optimizing out bound check on 64 bit systems

This re-wording of the previous snippet hints to the compiler
more directly, that this condition can be dropped if the
type of size_t is narrower than the one used for OEISprimes (uint64_t).

This optimization applies for 32 bit systems.

Author: BenBE

Hashtable.c

@@ -100,9 +100,16 @@ static const uint64_t OEISprimes[] = {
 
 static size_t nextPrime(size_t n) {
    /* on 32-bit make sure we do not return primes not fitting in size_t */
-   for (size_t i = 0; i < ARRAYSIZE(OEISprimes) && OEISprimes[i] < SIZE_MAX; i++) {
-      if (n <= OEISprimes[i])
+   for (size_t i = 0; i < ARRAYSIZE(OEISprimes); i++) {
+#if SIZE_MAX < UINT64_MAX
+      if (OEISprimes[i] > SIZE_MAX) {
+         break;
+      }
+#endif
+
+      if (n <= OEISprimes[i]) {
          return OEISprimes[i];
+      }
    }
 
    CRT_fatalError("Hashtable: no prime found");