Allow for bn(64,32) on LP64 platforms.

crypto/bn/bn.h

diff --git a/crypto/bn/bn.h b/crypto/bn/bn.h
index ca58617..baf72c3 100644
--- a/crypto/bn/bn.h
+++ b/crypto/bn/bn.h
@@ -174,8 +174,8 @@
 #  define BN_ULLONG	unsigned long long
 # endif
 #endif
-#define BN_ULONG	unsigned long
-#define BN_LONG		long
+#define BN_ULONG	unsigned int
+#define BN_LONG		int
 #define BN_BITS		64
 #define BN_BYTES	4
 #define BN_BITS2	32