commit de3b6d5848d5361490ed049154985d01dd5068f9
from: David du Colombier <0intro@gmail.com>
date: Sat Sep 29 13:59:31 2018 UTC

libregexp: include stddef.h in lib9.std.h

Commit 2d82ef9d98 added ptrdiff_t in regcomp.c.
However, this change broke the build of the Unix
package because ptrdiff_t is defined in stddef.h.

commit - a82a8b6368274d77d42f526e379b74e79c137e26
commit + de3b6d5848d5361490ed049154985d01dd5068f9
blob - 0cefdde73143768d9a77fc6cd83968b0cfc4c876
blob + 1d7aaa627f133c69006a479af7ae6c881e41915f
--- src/libregexp/lib9.std.h
+++ src/libregexp/lib9.std.h
@@ -3,6 +3,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <stddef.h>
 
 #define	exits(x)	exit(x && *x ? 1 : 0)