Make the NULL definition of OPENSSL_ia32cap_loc() compatible with the
declaration in crypto.h.

crypto/cryptlib.c

diff --git a/crypto/cryptlib.c b/crypto/cryptlib.c
index 520e42d..de8d4eb 100644
--- a/crypto/cryptlib.c
+++ b/crypto/cryptlib.c
@@ -697,7 +697,7 @@
 #endif
 
 #else
-unsigned long *OPENSSL_ia32cap_loc(void) { return NULL; }
+unsigned int *OPENSSL_ia32cap_loc(void) { return NULL; }
 #endif
 int OPENSSL_NONPIC_relocated = 0;
 #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)