SC (Apple's 68K C compiler) seems to treat tentative definitions of complete

arrya as full definitions, and hence gets upset when it finds a full definition
later.  This is a bug (see K&R2 A10.2), but an easy one to work around by
making the tentative definitions incomplete, so I've done that.

[originally from svn r2462]

sshaes.c

@@ -61,9 +61,9 @@ struct AESContext {
     int Nb, Nr;
 };
 
-static const unsigned char Sbox[256], Sboxinv[256];
-static const word32 E0[256], E1[256], E2[256], E3[256];
-static const word32 D0[256], D1[256], D2[256], D3[256];
+static const unsigned char Sbox[], Sboxinv[];
+static const word32 E0[], E1[], E2[], E3[];
+static const word32 D0[], D1[], D2[], D3[];
 
 /*
  * Common macros in both the encryption and decryption routines.