util.h: slightly improve portability

Tested with the scc compiler which is a pure c99 compiler.

sys/types.h is not needed here anymore (it was used for ssize_t).

Side-note: scc can now compile the sfeed parser program!
It requires these changes at the time of writing: Add a strcasecmp and
strncasecmp function and use getchar instead of getchar_unlocked.

2 files changed, 2 insertions, 3 deletions

diff --git a/README b/README
index a313cd8..95f4e9a 100644
--- a/README
+++ b/README
@@ -153,7 +153,7 @@ OS tested
 ---------
 
 - Linux,
-  compilers: clang, gcc, chibicc, cproc, lacc, pcc, tcc,
+  compilers: clang, gcc, chibicc, cproc, lacc, pcc, scc, tcc,
   libc: glibc, musl.
 - OpenBSD (clang, gcc).
 - NetBSD (with NetBSD curses).
diff --git a/util.h b/util.h
index 8053750..7923cdc 100644
--- a/util.h
+++ b/util.h
@@ -1,6 +1,5 @@
-#include <sys/types.h>
-
 #include <stdio.h>
+#include <time.h>
 
 #ifdef __OpenBSD__
 #include <unistd.h>