Remove __BEGIN_DECLS and __END_DECLS as those do not exist on Solaris (and we do not need them)

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3777 d4fa192b-c00b-0410-8231-f00ffab90ce4

include/vsha256.h

@@ -37,11 +37,9 @@ typedef struct SHA256Context {
 	unsigned char buf[64];
 } SHA256_CTX;
 
-__BEGIN_DECLS
 void	SHA256_Init(SHA256_CTX *);
 void	SHA256_Update(SHA256_CTX *, const void *, size_t);
 void	SHA256_Final(unsigned char [32], SHA256_CTX *);
 void	SHA256_Test(void);
-__END_DECLS
 
 #endif /* !_SHA256_H_ */