* lib/groupio.h, lib/prototypes.h, lib/pwio.h, lib/sgetgrent.c:

Include <sys/types.h> before <pwd.h> and <grp.h>. It is necessary
	for the definition of uid_t and gid_t.
	* lib/pwmem.c: do not include <pwd.h>, "pwio.h" is sufficient
	here.

lib/prototypes.h

@@ -48,6 +48,7 @@
 #else
 #include <utmp.h>
 #endif
+#include <sys/types.h>
 #include <pwd.h>
 #include <grp.h>
 #include <shadow.h>