* libltp/include/test.h: Fix C warnings.

* winsup.api/checksignal.c: Ditto.
* winsup.api/crlf.c: Ditto.
* winsup.api/devzero.c: Ditto.
* winsup.api/iospeed.c: Ditto.
* winsup.api/mmaptest01.c: Ditto.
* winsup.api/mmaptest02.c: Ditto.
* winsup.api/mmaptest03.c: Ditto.
* winsup.api/mmaptest04.c: Ditto.
* winsup.api/nullgetcwd.c: Ditto.
* winsup.api/sigchld.c: Ditto.
* winsup.api/signal-into-win32-api.c: Ditto.
* winsup.api/systemcall.c: Ditto.
* winsup.api/waitpid.c: Ditto.
* winsup.api/pthread/mainthreadexits.c: Ditto.
* winsup.api/pthread/test.h: Ditto.
* winsup.api/pthread/threadidafterfork.c: Ditto.
* Makefile.in: Remove cygrun.exe from RUNTIME since it is built here now.

winsup/testsuite/winsup.api/mmaptest04.c

@@ -2,6 +2,9 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
 
 #ifndef O_BINARY
 #define O_BINARY 0
@@ -10,7 +13,7 @@
 int
 main ()
 {
-  char *data, *data2, *data3;
+  char *data, *data2 = NULL, *data3;
   int i, pagesize;
   int fd;