In rev.1.4 type of (group)->gr_gid was changes from (int) to (gid_t),

so that <sys/types.h> is now required. Add it, otherwise it breaks
some ports.

Submitted by:	Joe Marcus Clarke <marcus@marcuscom.com>

include/grp.h

@@ -46,6 +46,8 @@
 #define	_PATH_GROUP		"/etc/group"
 #endif
 
+#include <sys/types.h>
+
 struct group {
 	char	*gr_name;		/* group name */
 	char	*gr_passwd;		/* group password */