secstore: avoid name conflict with SS macro

src/cmd/auth/secstore/SConn.c

diff --git a/src/cmd/auth/secstore/SConn.c b/src/cmd/auth/secstore/SConn.c
index 9ad9a7c..07e9232 100644
--- a/src/cmd/auth/secstore/SConn.c
+++ b/src/cmd/auth/secstore/SConn.c
@@ -12,7 +12,8 @@
 	RC4state rc4;
 } ConnState;
 
-typedef struct SS{
+#undef SS
+typedef struct SS {
 	int fd;		/* file descriptor for read/write of encrypted data */
 	int alg;	/* if nonzero, "alg sha rc4_128" */
 	ConnState in, out;