Restore NUMPRIMES as a numeric literal

This fixes clang compilation problem with size_t NUMPRIMES and int
loop counters.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Makefile.in

@@ -442,9 +442,9 @@ depend:
 update: generate errors ordinals depend
 
 generate:
-	(cd apps && $(MAKE) generate)
-	(cd crypto/bn && $(MAKE) generate)
-	(cd crypto/objects && $(MAKE) generate)
+	(cd apps && PERL='${PERL}' $(MAKE) generate)
+	(cd crypto/bn && PERL='${PERL}' $(MAKE) generate)
+	(cd crypto/objects && PERL='${PERL}' $(MAKE) generate)
 
 errors:
 	$(PERL) util/ck_errf.pl -strict */*.c */*/*.c

crypto/bn/bn_prime.c

@@ -121,8 +121,6 @@
  */
 #include "bn_prime.h"
 
-#define NUMPRIMES OSSL_NELEM(primes)
-
 static int witness(BIGNUM *w, const BIGNUM *a, const BIGNUM *a1,
                    const BIGNUM *a1_odd, int k, BN_CTX *ctx,
                    BN_MONT_CTX *mont);

crypto/bn/bn_prime.h

@@ -57,7 +57,10 @@
  */
 
 typedef unsigned short prime_t;
-static const prime_t primes[] = {
+# define NUMPRIMES 2048
+
+static const prime_t primes[2048] = {
+
        2,    3,    5,    7,   11,   13,   17,   19, 
       23,   29,   31,   37,   41,   43,   47,   53, 
       59,   61,   67,   71,   73,   79,   83,   89, 

crypto/bn/bn_prime.pl

@@ -76,8 +76,9 @@ loop: while ($#primes < $num-1) {
 }
 
 print "typedef unsigned short prime_t;\n";
+printf "# define NUMPRIMES %d\n\n", $num;
 
-print "static const prime_t primes[] = {";
+printf "static const prime_t primes[%d] = {\n", $num;
 for (my $i = 0; $i <= $#primes; $i++) {
     printf "\n    " if ($i % 8) == 0;
     printf "%4d, ", $primes[$i];