Fix auth_gssapi compilation.

Do not use array_elements in CREATE_TYPELIB_FOR, as not to force
my_global.h on every plugin. auth_gssapi lived OK without it so far.

include/typelib.h

@@ -27,7 +27,7 @@ typedef struct st_typelib {	/* Different types saved here */
   unsigned int *type_lengths;
 } TYPELIB;
 
-#define CREATE_TYPELIB_FOR(X) { array_elements(X) - 1, "", X, NULL }
+#define CREATE_TYPELIB_FOR(X) { (unsigned int)(sizeof(X)/sizeof(X[0])) - 1, "", X, NULL }
 
 extern my_ulonglong find_typeset(const char *x, TYPELIB *typelib,
                                  int *error_position);