group.h: Fix the struct tag for `group'.

Maybe I was going to give it a longer name once upon a time.  It's stuck
now, though.

diff --git a/group.h b/group.h
index a144706..4886985 100644 (file)
--- a/group.h
+++ b/group.h
@@ -64,7 +64,7 @@
   typedef struct ge ge;                        /* Group element (abstract type) */
 #endif
 
-typedef struct group_ {
+typedef struct group {
   const struct group_ops *ops;         /* Operations table */
   size_t nbits;                                /* Size of an element in bits */
   size_t noctets;                      /* Size of raw element in octets */